src/Content/Text/BBCode.php

   1 <?php
   2 /**
   3  * @file src/Content/Text/BBCode.php
   4  */
   5
   6 namespace Friendica\Content\Text;
   7
   8 use DOMDocument;
   9 use DOMXPath;
  10 use Exception;
  11 use Friendica\BaseObject;
  12 use Friendica\Content\OEmbed;
  13 use Friendica\Content\Smilies;
  14 use Friendica\Core\Cache;
  15 use Friendica\Core\Config;
  16 use Friendica\Core\Hook;
  17 use Friendica\Core\L10n;
  18 use Friendica\Core\Logger;
  19 use Friendica\Core\Protocol;
  20 use Friendica\Core\Renderer;
  21 use Friendica\Core\System;
  22 use Friendica\Model\Contact;
  23 use Friendica\Model\Event;
  24 use Friendica\Network\Probe;
  25 use Friendica\Object\Image;
  26 use Friendica\Util\Map;
  27 use Friendica\Util\Network;
  28 use Friendica\Util\ParseUrl;
  29 use Friendica\Util\Proxy as ProxyUtils;
  30 use Friendica\Util\Strings;
  31 use Friendica\Util\XML;
  32
  33 class BBCode extends BaseObject
  34 {
  35         /**
  36          * @brief Fetches attachment data that were generated the old way
  37          *
  38          * @param string $body Message body
  39          * @return array
  40          *                     'type' -> Message type ("link", "video", "photo")
  41          *                     'text' -> Text before the shared message
  42          *                     'after' -> Text after the shared message
  43          *                     'image' -> Preview image of the message
  44          *                     'url' -> Url to the attached message
  45          *                     'title' -> Title of the attachment
  46          *                     'description' -> Description of the attachment
  47          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
  48          */
  49         private static function getOldAttachmentData($body)
  50         {
  51                 $post = [];
  52
  53                 // Simplify image codes
  54                 $body = preg_replace("/\[img\=([0-9]*)x([0-9]*)\](.*?)\[\/img\]/ism", '[img]$3[/img]', $body);
  55
  56                 if (preg_match_all("(\[class=(.*?)\](.*?)\[\/class\])ism", $body, $attached, PREG_SET_ORDER)) {
  57                         foreach ($attached as $data) {
  58                                 if (!in_array($data[1], ["type-link", "type-video", "type-photo"])) {
  59                                         continue;
  60                                 }
  61
  62                                 $post["type"] = substr($data[1], 5);
  63
  64                                 $pos = strpos($body, $data[0]);
  65                                 if ($pos > 0) {
  66                                         $post["text"] = trim(substr($body, 0, $pos));
  67                                         $post["after"] = trim(substr($body, $pos + strlen($data[0])));
  68                                 } else {
  69                                         $post["text"] = trim(str_replace($data[0], "", $body));
  70                                         $post["after"] = '';
  71                                 }
  72
  73                                 $attacheddata = $data[2];
  74
  75                                 $URLSearchString = "^\[\]";
  76
  77                                 if (preg_match("/\[img\]([$URLSearchString]*)\[\/img\]/ism", $attacheddata, $matches)) {
  78
  79                                         $picturedata = Image::getInfoFromURL($matches[1]);
  80
  81                                         if ($picturedata) {
  82                                                 if (($picturedata[0] >= 500) && ($picturedata[0] >= $picturedata[1])) {
  83                                                         $post["image"] = $matches[1];
  84                                                 } else {
  85                                                         $post["preview"] = $matches[1];
  86                                                 }
  87                                         }
  88                                 }
  89
  90                                 if (preg_match("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism", $attacheddata, $matches)) {
  91                                         $post["url"] = $matches[1];
  92                                         $post["title"] = $matches[2];
  93                                 }
  94                                 if (!empty($post["url"]) && (in_array($post["type"], ["link", "video"]))
  95                                         && preg_match("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism", $attacheddata, $matches)) {
  96                                         $post["url"] = $matches[1];
  97                                 }
  98
  99                                 // Search for description
 100                                 if (preg_match("/\[quote\](.*?)\[\/quote\]/ism", $attacheddata, $matches)) {
 101                                         $post["description"] = $matches[1];
 102                                 }
 103                         }
 104                 }
 105                 return $post;
 106         }
 107
 108         /**
 109          * @brief Fetches attachment data that were generated with the "attachment" element
 110          *
 111          * @param string $body Message body
 112          * @return array
 113          *                     'type' -> Message type ("link", "video", "photo")
 114          *                     'text' -> Text before the shared message
 115          *                     'after' -> Text after the shared message
 116          *                     'image' -> Preview image of the message
 117          *                     'url' -> Url to the attached message
 118          *                     'title' -> Title of the attachment
 119          *                     'description' -> Description of the attachment
 120          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 121          */
 122         public static function getAttachmentData($body)
 123         {
 124                 $data = [];
 125
 126                 if (!preg_match("/(.*)\[attachment(.*?)\](.*?)\[\/attachment\](.*)/ism", $body, $match)) {
 127                         return self::getOldAttachmentData($body);
 128                 }
 129
 130                 $attributes = $match[2];
 131
 132                 $data["text"] = trim($match[1]);
 133
 134                 $type = "";
 135                 preg_match("/type='(.*?)'/ism", $attributes, $matches);
 136                 if (!empty($matches[1])) {
 137                         $type = strtolower($matches[1]);
 138                 }
 139
 140                 preg_match('/type="(.*?)"/ism', $attributes, $matches);
 141                 if (!empty($matches[1])) {
 142                         $type = strtolower($matches[1]);
 143                 }
 144
 145                 if ($type == "") {
 146                         return [];
 147                 }
 148
 149                 if (!in_array($type, ["link", "audio", "photo", "video"])) {
 150                         return [];
 151                 }
 152
 153                 if ($type != "") {
 154                         $data["type"] = $type;
 155                 }
 156
 157                 $url = "";
 158                 preg_match("/url='(.*?)'/ism", $attributes, $matches);
 159                 if (!empty($matches[1])) {
 160                         $url = $matches[1];
 161                 }
 162
 163                 preg_match('/url="(.*?)"/ism', $attributes, $matches);
 164                 if (!empty($matches[1])) {
 165                         $url = $matches[1];
 166                 }
 167
 168                 if ($url != "") {
 169                         $data["url"] = html_entity_decode($url, ENT_QUOTES, 'UTF-8');
 170                 }
 171
 172                 $title = "";
 173                 preg_match("/title='(.*?)'/ism", $attributes, $matches);
 174                 if (!empty($matches[1])) {
 175                         $title = $matches[1];
 176                 }
 177
 178                 preg_match('/title="(.*?)"/ism', $attributes, $matches);
 179                 if (!empty($matches[1])) {
 180                         $title = $matches[1];
 181                 }
 182
 183                 if ($title != "") {
 184                         $title = self::convert(html_entity_decode($title, ENT_QUOTES, 'UTF-8'), false, true);
 185                         $title = html_entity_decode($title, ENT_QUOTES, 'UTF-8');
 186                         $title = str_replace(["[", "]"], ["&#91;", "&#93;"], $title);
 187                         $data["title"] = $title;
 188                 }
 189
 190                 $image = "";
 191                 preg_match("/image='(.*?)'/ism", $attributes, $matches);
 192                 if (!empty($matches[1])) {
 193                         $image = $matches[1];
 194                 }
 195
 196                 preg_match('/image="(.*?)"/ism', $attributes, $matches);
 197                 if (!empty($matches[1])) {
 198                         $image = $matches[1];
 199                 }
 200
 201                 if ($image != "") {
 202                         $data["image"] = html_entity_decode($image, ENT_QUOTES, 'UTF-8');
 203                 }
 204
 205                 $preview = "";
 206                 preg_match("/preview='(.*?)'/ism", $attributes, $matches);
 207                 if (!empty($matches[1])) {
 208                         $preview = $matches[1];
 209                 }
 210
 211                 preg_match('/preview="(.*?)"/ism', $attributes, $matches);
 212                 if (!empty($matches[1])) {
 213                         $preview = $matches[1];
 214                 }
 215
 216                 if ($preview != "") {
 217                         $data["preview"] = html_entity_decode($preview, ENT_QUOTES, 'UTF-8');
 218                 }
 219
 220                 $data["description"] = trim($match[3]);
 221
 222                 $data["after"] = trim($match[4]);
 223
 224                 return $data;
 225         }
 226
 227         public static function getAttachedData($body, $item = [])
 228         {
 229                 /*
 230                 - text:
 231                 - type: link, video, photo
 232                 - title:
 233                 - url:
 234                 - image:
 235                 - description:
 236                 - (thumbnail)
 237                 */
 238
 239                 $has_title = !empty($item['title']);
 240                 $plink = defaults($item, 'plink', '');
 241                 $post = self::getAttachmentData($body);
 242
 243                 // if nothing is found, it maybe having an image.
 244                 if (!isset($post["type"])) {
 245                         // Simplify image codes
 246                         $body = preg_replace("/\[img\=([0-9]*)x([0-9]*)\](.*?)\[\/img\]/ism", '[img]$3[/img]', $body);
 247
 248                         $URLSearchString = "^\[\]";
 249
 250                         $body = preg_replace("/\[img\=([$URLSearchString]*)\](.*?)\[\/img\]/ism", '[img]$1[/img]', $body);
 251
 252                         if (preg_match_all("(\[url=([$URLSearchString]*)\]\s*\[img\]([$URLSearchString]*)\[\/img\]\s*\[\/url\])ism", $body, $pictures, PREG_SET_ORDER)) {
 253                                 if ((count($pictures) == 1) && !$has_title) {
 254                                         // Checking, if the link goes to a picture
 255                                         $data = ParseUrl::getSiteinfoCached($pictures[0][1], true);
 256
 257                                         // Workaround:
 258                                         // Sometimes photo posts to the own album are not detected at the start.
 259                                         // So we seem to cannot use the cache for these cases. That's strange.
 260                                         if (($data["type"] != "photo") && strstr($pictures[0][1], "/photos/")) {
 261                                                 $data = ParseUrl::getSiteinfo($pictures[0][1], true);
 262                                         }
 263
 264                                         if ($data["type"] == "photo") {
 265                                                 $post["type"] = "photo";
 266                                                 if (isset($data["images"][0])) {
 267                                                         $post["image"] = $data["images"][0]["src"];
 268                                                         $post["url"] = $data["url"];
 269                                                 } else {
 270                                                         $post["image"] = $data["url"];
 271                                                 }
 272
 273                                                 $post["preview"] = $pictures[0][2];
 274                                                 $post["text"] = str_replace($pictures[0][0], "", $body);
 275                                         } else {
 276                                                 $imgdata = Image::getInfoFromURL($pictures[0][1]);
 277                                                 if ($imgdata && substr($imgdata["mime"], 0, 6) == "image/") {
 278                                                         $post["type"] = "photo";
 279                                                         $post["image"] = $pictures[0][1];
 280                                                         $post["preview"] = $pictures[0][2];
 281                                                         $post["text"] = str_replace($pictures[0][0], "", $body);
 282                                                 }
 283                                         }
 284                                 } elseif (count($pictures) > 0) {
 285                                         $post["type"] = "link";
 286                                         $post["url"] = $plink;
 287                                         $post["image"] = $pictures[0][2];
 288                                         $post["text"] = $body;
 289                                 }
 290                         } elseif (preg_match_all("(\[img\]([$URLSearchString]*)\[\/img\])ism", $body, $pictures, PREG_SET_ORDER)) {
 291                                 if ((count($pictures) == 1) && !$has_title) {
 292                                         $post["type"] = "photo";
 293                                         $post["image"] = $pictures[0][1];
 294                                         $post["text"] = str_replace($pictures[0][0], "", $body);
 295                                 } elseif (count($pictures) > 0) {
 296                                         $post["type"] = "link";
 297                                         $post["url"] = $plink;
 298                                         $post["image"] = $pictures[0][1];
 299                                         $post["text"] = $body;
 300                                 }
 301                         }
 302
 303                         // Test for the external links
 304                         preg_match_all("(\[url\]([$URLSearchString]*)\[\/url\])ism", $body, $links1, PREG_SET_ORDER);
 305                         preg_match_all("(\[url\=([$URLSearchString]*)\].*?\[\/url\])ism", $body, $links2, PREG_SET_ORDER);
 306
 307                         $links = array_merge($links1, $links2);
 308
 309                         // If there is only a single one, then use it.
 310                         // This should cover link posts via API.
 311                         if ((count($links) == 1) && !isset($post["preview"]) && !$has_title) {
 312                                 $post["type"] = "link";
 313                                 $post["text"] = trim($body);
 314                                 $post["url"] = $links[0][1];
 315                         }
 316
 317                         // Now count the number of external media links
 318                         preg_match_all("(\[vimeo\](.*?)\[\/vimeo\])ism", $body, $links1, PREG_SET_ORDER);
 319                         preg_match_all("(\[youtube\\](.*?)\[\/youtube\\])ism", $body, $links2, PREG_SET_ORDER);
 320                         preg_match_all("(\[video\\](.*?)\[\/video\\])ism", $body, $links3, PREG_SET_ORDER);
 321                         preg_match_all("(\[audio\\](.*?)\[\/audio\\])ism", $body, $links4, PREG_SET_ORDER);
 322
 323                         // Add them to the other external links
 324                         $links = array_merge($links, $links1, $links2, $links3, $links4);
 325
 326                         // Are there more than one?
 327                         if (count($links) > 1) {
 328                                 // The post will be the type "text", which means a blog post
 329                                 unset($post["type"]);
 330                                 $post["url"] = $plink;
 331                         }
 332
 333                         if (!isset($post["type"])) {
 334                                 $post["type"] = "text";
 335                                 $post["text"] = trim($body);
 336                         }
 337                 } elseif (isset($post["url"]) && ($post["type"] == "video")) {
 338                         $data = ParseUrl::getSiteinfoCached($post["url"], true);
 339
 340                         if (isset($data["images"][0])) {
 341                                 $post["image"] = $data["images"][0]["src"];
 342                         }
 343                 }
 344
 345                 return $post;
 346         }
 347
 348         /**
 349          * @brief Converts a BBCode text into plaintext
 350          *
 351          * @param      $text
 352          * @param bool $keep_urls Whether to keep URLs in the resulting plaintext
 353          *
 354          * @return string
 355          */
 356         public static function toPlaintext($text, $keep_urls = true)
 357         {
 358                 $naked_text = preg_replace('/\[(.+?)\]\s*/','', $text);
 359                 if (!$keep_urls) {
 360                         $naked_text = preg_replace('#https?\://[^\s<]+[^\s\.\)]#i', '', $naked_text);
 361                 }
 362
 363                 return $naked_text;
 364         }
 365
 366         private static function proxyUrl($image, $simplehtml = false)
 367         {
 368                 // Only send proxied pictures to API and for internal display
 369                 if (in_array($simplehtml, [false, 2])) {
 370                         return ProxyUtils::proxifyUrl($image);
 371                 } else {
 372                         return $image;
 373                 }
 374         }
 375
 376         public static function scaleExternalImages($srctext, $include_link = true, $scale_replace = false)
 377         {
 378                 // Suppress "view full size"
 379                 if (intval(Config::get('system', 'no_view_full_size'))) {
 380                         $include_link = false;
 381                 }
 382
 383                 // Picture addresses can contain special characters
 384                 $s = htmlspecialchars_decode($srctext);
 385
 386                 $matches = null;
 387                 $c = preg_match_all('/\[img.*?\](.*?)\[\/img\]/ism', $s, $matches, PREG_SET_ORDER);
 388                 if ($c) {
 389                         foreach ($matches as $mtch) {
 390                                 Logger::log('scale_external_image: ' . $mtch[1]);
 391
 392                                 $hostname = str_replace('www.', '', substr(System::baseUrl(), strpos(System::baseUrl(), '://') + 3));
 393                                 if (stristr($mtch[1], $hostname)) {
 394                                         continue;
 395                                 }
 396
 397                                 // $scale_replace, if passed, is an array of two elements. The
 398                                 // first is the name of the full-size image. The second is the
 399                                 // name of a remote, scaled-down version of the full size image.
 400                                 // This allows Friendica to display the smaller remote image if
 401                                 // one exists, while still linking to the full-size image
 402                                 if ($scale_replace) {
 403                                         $scaled = str_replace($scale_replace[0], $scale_replace[1], $mtch[1]);
 404                                 } else {
 405                                         $scaled = $mtch[1];
 406                                 }
 407                                 $i = Network::fetchUrl($scaled);
 408                                 if (!$i) {
 409                                         return $srctext;
 410                                 }
 411
 412                                 // guess mimetype from headers or filename
 413                                 $type = Image::guessType($mtch[1], true);
 414
 415                                 if ($i) {
 416                                         $Image = new Image($i, $type);
 417                                         if ($Image->isValid()) {
 418                                                 $orig_width = $Image->getWidth();
 419                                                 $orig_height = $Image->getHeight();
 420
 421                                                 if ($orig_width > 640 || $orig_height > 640) {
 422                                                         $Image->scaleDown(640);
 423                                                         $new_width = $Image->getWidth();
 424                                                         $new_height = $Image->getHeight();
 425                                                         Logger::log('scale_external_images: ' . $orig_width . '->' . $new_width . 'w ' . $orig_height . '->' . $new_height . 'h' . ' match: ' . $mtch[0], Logger::DEBUG);
 426                                                         $s = str_replace(
 427                                                                 $mtch[0],
 428                                                                 '[img=' . $new_width . 'x' . $new_height. ']' . $scaled . '[/img]'
 429                                                                 . "\n" . (($include_link)
 430                                                                         ? '[url=' . $mtch[1] . ']' . L10n::t('view full size') . '[/url]' . "\n"
 431                                                                         : ''),
 432                                                                 $s
 433                                                         );
 434                                                         Logger::log('scale_external_images: new string: ' . $s, Logger::DEBUG);
 435                                                 }
 436                                         }
 437                                 }
 438                         }
 439                 }
 440
 441                 // replace the special char encoding
 442                 $s = htmlspecialchars($s, ENT_NOQUOTES, 'UTF-8');
 443                 return $s;
 444         }
 445
 446         /**
 447          * The purpose of this function is to apply system message length limits to
 448          * imported messages without including any embedded photos in the length
 449          *
 450          * @brief Truncates imported message body string length to max_import_size
 451          * @param string $body
 452          * @return string
 453          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 454          */
 455         public static function limitBodySize($body)
 456         {
 457                 $maxlen = Config::get('config', 'max_import_size', 0);
 458
 459                 // If the length of the body, including the embedded images, is smaller
 460                 // than the maximum, then don't waste time looking for the images
 461                 if ($maxlen && (strlen($body) > $maxlen)) {
 462
 463                         Logger::log('the total body length exceeds the limit', Logger::DEBUG);
 464
 465                         $orig_body = $body;
 466                         $new_body = '';
 467                         $textlen = 0;
 468
 469                         $img_start = strpos($orig_body, '[img');
 470                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
 471                         $img_end = ($img_start !== false ? strpos(substr($orig_body, $img_start), '[/img]') : false);
 472                         while (($img_st_close !== false) && ($img_end !== false)) {
 473
 474                                 $img_st_close++; // make it point to AFTER the closing bracket
 475                                 $img_end += $img_start;
 476                                 $img_end += strlen('[/img]');
 477
 478                                 if (!strcmp(substr($orig_body, $img_start + $img_st_close, 5), 'data:')) {
 479                                         // This is an embedded image
 480
 481                                         if (($textlen + $img_start) > $maxlen) {
 482                                                 if ($textlen < $maxlen) {
 483                                                         Logger::log('the limit happens before an embedded image', Logger::DEBUG);
 484                                                         $new_body = $new_body . substr($orig_body, 0, $maxlen - $textlen);
 485                                                         $textlen = $maxlen;
 486                                                 }
 487                                         } else {
 488                                                 $new_body = $new_body . substr($orig_body, 0, $img_start);
 489                                                 $textlen += $img_start;
 490                                         }
 491
 492                                         $new_body = $new_body . substr($orig_body, $img_start, $img_end - $img_start);
 493                                 } else {
 494
 495                                         if (($textlen + $img_end) > $maxlen) {
 496                                                 if ($textlen < $maxlen) {
 497                                                         Logger::log('the limit happens before the end of a non-embedded image', Logger::DEBUG);
 498                                                         $new_body = $new_body . substr($orig_body, 0, $maxlen - $textlen);
 499                                                         $textlen = $maxlen;
 500                                                 }
 501                                         } else {
 502                                                 $new_body = $new_body . substr($orig_body, 0, $img_end);
 503                                                 $textlen += $img_end;
 504                                         }
 505                                 }
 506                                 $orig_body = substr($orig_body, $img_end);
 507
 508                                 if ($orig_body === false) {
 509                                         // in case the body ends on a closing image tag
 510                                         $orig_body = '';
 511                                 }
 512
 513                                 $img_start = strpos($orig_body, '[img');
 514                                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
 515                                 $img_end = ($img_start !== false ? strpos(substr($orig_body, $img_start), '[/img]') : false);
 516                         }
 517
 518                         if (($textlen + strlen($orig_body)) > $maxlen) {
 519                                 if ($textlen < $maxlen) {
 520                                         Logger::log('the limit happens after the end of the last image', Logger::DEBUG);
 521                                         $new_body = $new_body . substr($orig_body, 0, $maxlen - $textlen);
 522                                 }
 523                         } else {
 524                                 Logger::log('the text size with embedded images extracted did not violate the limit', Logger::DEBUG);
 525                                 $new_body = $new_body . $orig_body;
 526                         }
 527
 528                         return $new_body;
 529                 } else {
 530                         return $body;
 531                 }
 532         }
 533
 534         /**
 535          * Processes [attachment] tags
 536          *
 537          * Note: Can produce a [bookmark] tag in the returned string
 538          *
 539          * @brief Processes [attachment] tags
 540          * @param string   $return
 541          * @param bool|int $simplehtml
 542          * @param bool     $tryoembed
 543          * @return string
 544          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 545          */
 546         private static function convertAttachment($return, $simplehtml = false, $tryoembed = true)
 547         {
 548                 $data = self::getAttachmentData($return);
 549                 if (empty($data) || empty($data["url"])) {
 550                         return $return;
 551                 }
 552
 553                 if (isset($data["title"])) {
 554                         $data["title"] = strip_tags($data["title"]);
 555                         $data["title"] = str_replace(["http://", "https://"], "", $data["title"]);
 556                 } else {
 557                         $data["title"] = null;
 558                 }
 559
 560                 if (((strpos($data["text"], "[img=") !== false) || (strpos($data["text"], "[img]") !== false) || Config::get('system', 'always_show_preview')) && !empty($data["image"])) {
 561                         $data["preview"] = $data["image"];
 562                         $data["image"] = "";
 563                 }
 564
 565                 $return = '';
 566                 if ($simplehtml == 7) {
 567                         $return = self::convertUrlForOStatus($data["url"]);
 568                 } elseif (($simplehtml != 4) && ($simplehtml != 0)) {
 569                         $return = sprintf('<a href="%s" target="_blank">%s</a><br>', $data["url"], $data["title"]);
 570                 } else {
 571                         try {
 572                                 if ($tryoembed && OEmbed::isAllowedURL($data['url'])) {
 573                                         $return = OEmbed::getHTML($data['url'], $data['title']);
 574                                 } else {
 575                                         throw new Exception('OEmbed is disabled for this attachment.');
 576                                 }
 577                         } catch (Exception $e) {
 578                                 $data["title"] = defaults($data, 'title', $data['url']);
 579
 580                                 if ($simplehtml != 4) {
 581                                         $return = sprintf('<div class="type-%s">', $data["type"]);
 582                                 }
 583
 584                                 if (!empty($data['title']) && !empty($data['url'])) {
 585                                         if (!empty($data["image"]) && empty($data["text"]) && ($data["type"] == "photo")) {
 586                                                 $return .= sprintf('<a href="%s" target="_blank"><img src="%s" alt="" title="%s" class="attachment-image" /></a>', $data["url"], self::proxyUrl($data["image"], $simplehtml), $data["title"]);
 587                                         } else {
 588                                                 if (!empty($data["image"])) {
 589                                                         $return .= sprintf('<a href="%s" target="_blank"><img src="%s" alt="" title="%s" class="attachment-image" /></a><br />', $data["url"], self::proxyUrl($data["image"], $simplehtml), $data["title"]);
 590                                                 } elseif (!empty($data["preview"])) {
 591                                                         $return .= sprintf('<a href="%s" target="_blank"><img src="%s" alt="" title="%s" class="attachment-preview" /></a><br />', $data["url"], self::proxyUrl($data["preview"], $simplehtml), $data["title"]);
 592                                                 }
 593                                                 $return .= sprintf('<h4><a href="%s">%s</a></h4>', $data['url'], $data['title']);
 594                                         }
 595                                 }
 596
 597                                 if (!empty($data["description"]) && $data["description"] != $data["title"]) {
 598                                         // Sanitize the HTML by converting it to BBCode
 599                                         $bbcode = HTML::toBBCode($data["description"]);
 600                                         $return .= sprintf('<blockquote>%s</blockquote>', trim(self::convert($bbcode)));
 601                                 }
 602
 603                                 if (!empty($data['url'])) {
 604                                         $return .= sprintf('<sup><a href="%s">%s</a></sup>', $data['url'], parse_url($data['url'], PHP_URL_HOST));
 605                                 }
 606
 607                                 if ($simplehtml != 4) {
 608                                         $return .= '</div>';
 609                                 }
 610                         }
 611                 }
 612
 613                 return trim(defaults($data, 'text', '') . ' ' . $return . ' ' . defaults($data, 'after', ''));
 614         }
 615
 616         public static function removeShareInformation($Text, $plaintext = false, $nolink = false)
 617         {
 618                 $data = self::getAttachmentData($Text);
 619
 620                 if (!$data) {
 621                         return $Text;
 622                 } elseif ($nolink) {
 623                         return $data["text"] . defaults($data, 'after', '');
 624                 }
 625
 626                 $title = htmlentities(defaults($data, 'title', ''), ENT_QUOTES, 'UTF-8', false);
 627                 $text = htmlentities($data["text"], ENT_QUOTES, 'UTF-8', false);
 628                 if ($plaintext || (($title != "") && strstr($text, $title))) {
 629                         $data["title"] = $data["url"];
 630                 } elseif (($text != "") && strstr($title, $text)) {
 631                         $data["text"] = $data["title"];
 632                         $data["title"] = $data["url"];
 633                 }
 634
 635                 if (empty($data["text"]) && !empty($data["title"]) && empty($data["url"])) {
 636                         return $data["title"] . $data["after"];
 637                 }
 638
 639                 // If the link already is included in the post, don't add it again
 640                 if (!empty($data["url"]) && strpos($data["text"], $data["url"])) {
 641                         return $data["text"] . $data["after"];
 642                 }
 643
 644                 $text = $data["text"];
 645
 646                 if (!empty($data["url"]) && !empty($data["title"])) {
 647                         $text .= "\n[url=" . $data["url"] . "]" . $data["title"] . "[/url]";
 648                 } elseif (!empty($data["url"])) {
 649                         $text .= "\n[url]" . $data["url"] . "[/url]";
 650                 }
 651
 652                 return $text . "\n" . $data["after"];
 653         }
 654
 655         /**
 656          * Converts [url] BBCodes in a format that looks fine on Mastodon. (callback function)
 657          *
 658          * @brief Converts [url] BBCodes in a format that looks fine on Mastodon. (callback function)
 659          * @param array $match Array with the matching values
 660          * @return string reformatted link including HTML codes
 661          */
 662         private static function convertUrlForOStatusCallback($match)
 663         {
 664                 $url = $match[1];
 665
 666                 if (isset($match[2]) && ($match[1] != $match[2])) {
 667                         return $match[0];
 668                 }
 669
 670                 $parts = parse_url($url);
 671                 if (!isset($parts['scheme'])) {
 672                         return $match[0];
 673                 }
 674
 675                 return self::convertUrlForOStatus($url);
 676         }
 677
 678         /**
 679          * @brief Converts [url] BBCodes in a format that looks fine on OStatus systems.
 680          * @param string $url URL that is about to be reformatted
 681          * @return string reformatted link including HTML codes
 682          */
 683         private static function convertUrlForOStatus($url)
 684         {
 685                 $parts = parse_url($url);
 686                 $scheme = $parts['scheme'] . '://';
 687                 $styled_url = str_replace($scheme, '', $url);
 688
 689                 if (strlen($styled_url) > 30) {
 690                         $styled_url = substr($styled_url, 0, 30) . "…";
 691                 }
 692
 693                 $html = '<a href="%s" target="_blank">%s</a>';
 694
 695                 return sprintf($html, $url, $styled_url);
 696         }
 697
 698         /*
 699          * [noparse][i]italic[/i][/noparse] turns into
 700          * [noparse][ i ]italic[ /i ][/noparse],
 701          * to hide them from parser.
 702          */
 703         private static function escapeNoparseCallback($match)
 704         {
 705                 $whole_match = $match[0];
 706                 $captured = $match[1];
 707                 $spacefied = preg_replace("/\[(.*?)\]/", "[ $1 ]", $captured);
 708                 $new_str = str_replace($captured, $spacefied, $whole_match);
 709                 return $new_str;
 710         }
 711
 712         /*
 713          * The previously spacefied [noparse][ i ]italic[ /i ][/noparse],
 714          * now turns back and the [noparse] tags are trimed
 715          * returning [i]italic[/i]
 716          */
 717         private static function unescapeNoparseCallback($match)
 718         {
 719                 $captured = $match[1];
 720                 $unspacefied = preg_replace("/\[ (.*?)\ ]/", "[$1]", $captured);
 721                 return $unspacefied;
 722         }
 723
 724         /**
 725          * Returns the bracket character positions of a set of opening and closing BBCode tags, optionally skipping first
 726          * occurrences
 727          *
 728          * @param string $text        Text to search
 729          * @param string $name        Tag name
 730          * @param int    $occurrences Number of first occurrences to skip
 731          * @return boolean|array
 732          */
 733         public static function getTagPosition($text, $name, $occurrences = 0)
 734         {
 735                 if ($occurrences < 0) {
 736                         $occurrences = 0;
 737                 }
 738
 739                 $start_open = -1;
 740                 for ($i = 0; $i <= $occurrences; $i++) {
 741                         if ($start_open !== false) {
 742                                 $start_open = strpos($text, '[' . $name, $start_open + 1); // allow [name= type tags
 743                         }
 744                 }
 745
 746                 if ($start_open === false) {
 747                         return false;
 748                 }
 749
 750                 $start_equal = strpos($text, '=', $start_open);
 751                 $start_close = strpos($text, ']', $start_open);
 752
 753                 if ($start_close === false) {
 754                         return false;
 755                 }
 756
 757                 $start_close++;
 758
 759                 $end_open = strpos($text, '[/' . $name . ']', $start_close);
 760
 761                 if ($end_open === false) {
 762                         return false;
 763                 }
 764
 765                 $res = [
 766                         'start' => [
 767                                 'open' => $start_open,
 768                                 'close' => $start_close
 769                         ],
 770                         'end' => [
 771                                 'open' => $end_open,
 772                                 'close' => $end_open + strlen('[/' . $name . ']')
 773                         ],
 774                 ];
 775
 776                 if ($start_equal !== false) {
 777                         $res['start']['equal'] = $start_equal + 1;
 778                 }
 779
 780                 return $res;
 781         }
 782
 783         /**
 784          * Performs a preg_replace within the boundaries of all named BBCode tags in a text
 785          *
 786          * @param string $pattern Preg pattern string
 787          * @param string $replace Preg replace string
 788          * @param string $name    BBCode tag name
 789          * @param string $text    Text to search
 790          * @return string
 791          */
 792         public static function pregReplaceInTag($pattern, $replace, $name, $text)
 793         {
 794                 $occurrences = 0;
 795                 $pos = self::getTagPosition($text, $name, $occurrences);
 796                 while ($pos !== false && $occurrences++ < 1000) {
 797                         $start = substr($text, 0, $pos['start']['open']);
 798                         $subject = substr($text, $pos['start']['open'], $pos['end']['close'] - $pos['start']['open']);
 799                         $end = substr($text, $pos['end']['close']);
 800                         if ($end === false) {
 801                                 $end = '';
 802                         }
 803
 804                         $subject = preg_replace($pattern, $replace, $subject);
 805                         $text = $start . $subject . $end;
 806
 807                         $pos = self::getTagPosition($text, $name, $occurrences);
 808                 }
 809
 810                 return $text;
 811         }
 812
 813         private static function extractImagesFromItemBody($body)
 814         {
 815                 $saved_image = [];
 816                 $orig_body = $body;
 817                 $new_body = '';
 818
 819                 $cnt = 0;
 820                 $img_start = strpos($orig_body, '[img');
 821                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
 822                 $img_end = ($img_start !== false ? strpos(substr($orig_body, $img_start), '[/img]') : false);
 823                 while (($img_st_close !== false) && ($img_end !== false)) {
 824                         $img_st_close++; // make it point to AFTER the closing bracket
 825                         $img_end += $img_start;
 826
 827                         if (!strcmp(substr($orig_body, $img_start + $img_st_close, 5), 'data:')) {
 828                                 // This is an embedded image
 829                                 $saved_image[$cnt] = substr($orig_body, $img_start + $img_st_close, $img_end - ($img_start + $img_st_close));
 830                                 $new_body = $new_body . substr($orig_body, 0, $img_start) . '[$#saved_image' . $cnt . '#$]';
 831
 832                                 $cnt++;
 833                         } else {
 834                                 $new_body = $new_body . substr($orig_body, 0, $img_end + strlen('[/img]'));
 835                         }
 836
 837                         $orig_body = substr($orig_body, $img_end + strlen('[/img]'));
 838
 839                         if ($orig_body === false) {
 840                                 // in case the body ends on a closing image tag
 841                                 $orig_body = '';
 842                         }
 843
 844                         $img_start = strpos($orig_body, '[img');
 845                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
 846                         $img_end = ($img_start !== false ? strpos(substr($orig_body, $img_start), '[/img]') : false);
 847                 }
 848
 849                 $new_body = $new_body . $orig_body;
 850
 851                 return ['body' => $new_body, 'images' => $saved_image];
 852         }
 853
 854         private static function interpolateSavedImagesIntoItemBody($body, array $images)
 855         {
 856                 $newbody = $body;
 857
 858                 $cnt = 0;
 859                 foreach ($images as $image) {
 860                         // We're depending on the property of 'foreach' (specified on the PHP website) that
 861                         // it loops over the array starting from the first element and going sequentially
 862                         // to the last element
 863                         $newbody = str_replace('[$#saved_image' . $cnt . '#$]',
 864                                 '<img src="' . self::proxyUrl($image) . '" alt="' . L10n::t('Image/photo') . '" />', $newbody);
 865                         $cnt++;
 866                 }
 867
 868                 return $newbody;
 869         }
 870
 871         /**
 872          * This function converts a [share] block to text according to a provided callback function whose signature is:
 873          *
 874          * function(array $attributes, array $author_contact, string $content, boolean $is_quote_share): string
 875          *
 876          * Where:
 877          * - $attributes is an array of attributes of the [share] block itself. Missing keys will be completed by the contact
 878          * data lookup
 879          * - $author_contact is a contact record array
 880          * - $content is the inner content of the [share] block
 881          * - $is_quote_share indicates whether there's any content before the [share] block
 882          * - Return value is the string that should replace the [share] block in the provided text
 883          *
 884          * This function is intended to be used by addon connector to format a share block like the target network is expecting it.
 885          *
 886          * @param  string   $text     A BBCode string
 887          * @param  callable $callback
 888          * @return string The BBCode string with all [share] blocks replaced
 889          */
 890         public static function convertShare($text, callable $callback)
 891         {
 892                 $return = preg_replace_callback(
 893                         "/(.*?)\[share(.*?)\](.*?)\[\/share\]/ism",
 894                         function ($match) use ($callback) {
 895                                 $attribute_string = $match[2];
 896
 897                                 $attributes = [];
 898                                 foreach(['author', 'profile', 'avatar', 'link', 'posted'] as $field) {
 899                                         preg_match("/$field=(['\"])(.+?)\\1/ism", $attribute_string, $matches);
 900                                         $attributes[$field] = html_entity_decode(defaults($matches, 2, ''), ENT_QUOTES, 'UTF-8');
 901                                 }
 902
 903                                 // We only call this so that a previously unknown contact can be added.
 904                                 // This is important for the function "Model\Contact::getDetailsByURL()".
 905                                 // This function then can fetch an entry from the contact table.
 906                                 Contact::getIdForURL($attributes['profile'], 0, true);
 907
 908                                 $author_contact = Contact::getDetailsByURL($attributes['profile']);
 909                                 $author_contact['addr'] = defaults($author_contact, 'addr' , Protocol::getAddrFromProfileUrl($attributes['profile']));
 910
 911                                 $attributes['author']   = defaults($author_contact, 'name' , $attributes['author']);
 912                                 $attributes['avatar']   = defaults($author_contact, 'micro', $attributes['avatar']);
 913                                 $attributes['profile']  = defaults($author_contact, 'url'  , $attributes['profile']);
 914
 915                                 if ($attributes['avatar']) {
 916                                         $attributes['avatar'] = ProxyUtils::proxifyUrl($attributes['avatar'], false, ProxyUtils::SIZE_THUMB);
 917                                 }
 918
 919                                 return $match[1] . $callback($attributes, $author_contact, $match[3], trim($match[1]) != '');
 920                         },
 921                         $text
 922                 );
 923
 924                 return $return;
 925         }
 926
 927         /**
 928          * Default [share] tag conversion callback
 929          *
 930          * Note: Can produce a [bookmark] tag in the output
 931          *
 932          * @see BBCode::convertShare()
 933          * @param array   $attributes     [share] block attribute values
 934          * @param array   $author_contact Contact row of the shared author
 935          * @param string  $content        Inner content of the [share] block
 936          * @param boolean $is_quote_share Whether there is content before the [share] block
 937          * @param integer $simplehtml     Mysterious integer value depending on the target network/formatting style
 938          * @return string
 939          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 940          */
 941         private static function convertShareCallback(array $attributes, array $author_contact, $content, $is_quote_share, $simplehtml)
 942         {
 943                 $mention = Protocol::formatMention($attributes['profile'], $attributes['author']);
 944
 945                 switch ($simplehtml) {
 946                         case 1:
 947                                 $text = ($is_quote_share? '<br />' : '') . '<p>' . html_entity_decode('&#x2672; ', ENT_QUOTES, 'UTF-8') . ' <a href="' . $attributes['profile'] . '">' . $mention . '</a>: </p>' . "\n" . '«' . $content . '»';
 948                                 break;
 949                         case 2:
 950                                 $text = ($is_quote_share? '<br />' : '') . '<p>' . html_entity_decode('&#x2672; ', ENT_QUOTES, 'UTF-8') . ' ' . $author_contact['addr'] . ': </p>' . "\n" . $content;
 951                                 break;
 952                         case 3: // Diaspora
 953                                 if (stripos(Strings::normaliseLink($attributes['link']), 'http://twitter.com/') === 0) {
 954                                         $text = ($is_quote_share? '<hr />' : '') . '<p><a href="' . $attributes['link'] . '">' . $attributes['link'] . '</a></p>' . "\n";
 955                                 } else {
 956                                         $headline = '<p><b>♲ <a href="' . $attributes['profile'] . '">' . $attributes['author'] . '</a>:</b></p>' . "\n";
 957
 958                                         if (!empty($attributes['posted']) && !empty($attributes['link'])) {
 959                                                 $headline = '<p><b>♲ <a href="' . $attributes['profile'] . '">' . $attributes['author'] . '</a></b> - <a href="' . $attributes['link'] . '">' . $attributes['posted'] . ' GMT</a></p>' . "\n";
 960                                         }
 961
 962                                         $text = ($is_quote_share? '<hr />' : '') . $headline . '<blockquote>' . trim($content) . '</blockquote>' . "\n";
 963
 964                                         if (empty($attributes['posted']) && !empty($attributes['link'])) {
 965                                                 $text .= '<p><a href="' . $attributes['link'] . '">[Source]</a></p>' . "\n";
 966                                         }
 967                                 }
 968
 969                                 break;
 970                         case 4:
 971                                 $headline = '<p><b>' . html_entity_decode('&#x2672; ', ENT_QUOTES, 'UTF-8');
 972                                 $headline .= L10n::t('<a href="%1$s" target="_blank">%2$s</a> %3$s', $attributes['link'], $mention, $attributes['posted']);
 973                                 $headline .= ':</b></p>' . "\n";
 974
 975                                 $text = ($is_quote_share? '<hr />' : '') . $headline . '<blockquote class="shared_content">' . trim($content) . '</blockquote>' . "\n";
 976
 977                                 break;
 978                         case 5:
 979                                 $text = ($is_quote_share? '<br />' : '') . '<p>' . html_entity_decode('&#x2672; ', ENT_QUOTES, 'UTF-8') . ' ' . $author_contact['addr'] . ': </p>' . "\n" . $content;
 980                                 break;
 981                         case 7: // statusnet/GNU Social
 982                                 $text = ($is_quote_share? '<br />' : '') . '<p>' . html_entity_decode('&#x2672; ', ENT_QUOTES, 'UTF-8') . ' @' . $author_contact['addr'] . ': ' . $content . '</p>' . "\n";
 983                                 break;
 984                         case 9: // Google+
 985                                 $text = ($is_quote_share? '<br />' : '') . '<p>' . html_entity_decode('&#x2672; ', ENT_QUOTES, 'UTF-8') . ' ' . $author_contact['addr'] . ': </p>' . "\n";
 986                                 $text .= '<p>' . $content . '</p>' . "\n";
 987
 988                                 if ($attributes['link'] != '') {
 989                                         $text .= '<p>' . $attributes['link'] . '</p>';
 990                                 }
 991                                 break;
 992                         default:
 993                                 // Transforms quoted tweets in rich attachments to avoid nested tweets
 994                                 if (stripos(Strings::normaliseLink($attributes['link']), 'http://twitter.com/') === 0 && OEmbed::isAllowedURL($attributes['link'])) {
 995                                         try {
 996                                                 $text = ($is_quote_share? '<br />' : '') . OEmbed::getHTML($attributes['link']);
 997                                         } catch (Exception $e) {
 998                                                 $text = ($is_quote_share? '<br />' : '') . sprintf('[bookmark=%s]%s[/bookmark]', $attributes['link'], $content);
 999                                         }
1000                                 } else {
1001                                         $text = ($is_quote_share? "\n" : '');
1002
1003                                         $tpl = Renderer::getMarkupTemplate('shared_content.tpl');
1004                                         $text .= Renderer::replaceMacros($tpl, [
1005                                                 '$profile' => $attributes['profile'],
1006                                                 '$avatar'  => $attributes['avatar'],
1007                                                 '$author'  => $attributes['author'],
1008                                                 '$link'    => $attributes['link'],
1009                                                 '$posted'  => $attributes['posted'],
1010                                                 '$content' => trim($content)
1011                                         ]);
1012                                 }
1013                                 break;
1014                 }
1015
1016                 return $text;
1017         }
1018
1019         private static function removePictureLinksCallback($match)
1020         {
1021                 $text = Cache::get($match[1]);
1022
1023                 if (is_null($text)) {
1024                         $a = self::getApp();
1025
1026                         $stamp1 = microtime(true);
1027
1028                         $ch = @curl_init($match[1]);
1029                         @curl_setopt($ch, CURLOPT_NOBODY, true);
1030                         @curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
1031                         @curl_setopt($ch, CURLOPT_USERAGENT, $a->getUserAgent());
1032                         @curl_exec($ch);
1033                         $curl_info = @curl_getinfo($ch);
1034
1035                         $a->getProfiler()->saveTimestamp($stamp1, "network", System::callstack());
1036
1037                         if (substr($curl_info["content_type"], 0, 6) == "image/") {
1038                                 $text = "[url=" . $match[1] . "]" . $match[1] . "[/url]";
1039                         } else {
1040                                 $text = "[url=" . $match[2] . "]" . $match[2] . "[/url]";
1041
1042                                 // if its not a picture then look if its a page that contains a picture link
1043                                 $body = Network::fetchUrl($match[1]);
1044
1045                                 $doc = new DOMDocument();
1046                                 @$doc->loadHTML($body);
1047                                 $xpath = new DOMXPath($doc);
1048                                 $list = $xpath->query("//meta[@name]");
1049                                 foreach ($list as $node) {
1050                                         $attr = [];
1051
1052                                         if ($node->attributes->length) {
1053                                                 foreach ($node->attributes as $attribute) {
1054                                                         $attr[$attribute->name] = $attribute->value;
1055                                                 }
1056                                         }
1057
1058                                         if (strtolower($attr["name"]) == "twitter:image") {
1059                                                 $text = "[url=" . $attr["content"] . "]" . $attr["content"] . "[/url]";
1060                                         }
1061                                 }
1062                         }
1063                         Cache::set($match[1], $text);
1064                 }
1065
1066                 return $text;
1067         }
1068
1069         private static function expandLinksCallback($match)
1070         {
1071                 if (($match[3] == "") || ($match[2] == $match[3]) || stristr($match[2], $match[3])) {
1072                         return ($match[1] . "[url]" . $match[2] . "[/url]");
1073                 } else {
1074                         return ($match[1] . $match[3] . " [url]" . $match[2] . "[/url]");
1075                 }
1076         }
1077
1078         private static function cleanPictureLinksCallback($match)
1079         {
1080                 $text = Cache::get($match[1]);
1081
1082                 if (is_null($text)) {
1083                         $a = self::getApp();
1084
1085                         $stamp1 = microtime(true);
1086
1087                         $ch = @curl_init($match[1]);
1088                         @curl_setopt($ch, CURLOPT_NOBODY, true);
1089                         @curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
1090                         @curl_setopt($ch, CURLOPT_USERAGENT, $a->getUserAgent());
1091                         @curl_exec($ch);
1092                         $curl_info = @curl_getinfo($ch);
1093
1094                         $a->getProfiler()->saveTimestamp($stamp1, "network", System::callstack());
1095
1096                         // if its a link to a picture then embed this picture
1097                         if (substr($curl_info["content_type"], 0, 6) == "image/") {
1098                                 $text = "[img]" . $match[1] . "[/img]";
1099                         } else {
1100                                 $text = "[img]" . $match[2] . "[/img]";
1101
1102                                 // if its not a picture then look if its a page that contains a picture link
1103                                 $body = Network::fetchUrl($match[1]);
1104
1105                                 $doc = new DOMDocument();
1106                                 @$doc->loadHTML($body);
1107                                 $xpath = new DOMXPath($doc);
1108                                 $list = $xpath->query("//meta[@name]");
1109                                 foreach ($list as $node) {
1110                                         $attr = [];
1111                                         if ($node->attributes->length) {
1112                                                 foreach ($node->attributes as $attribute) {
1113                                                         $attr[$attribute->name] = $attribute->value;
1114                                                 }
1115                                         }
1116
1117                                         if (strtolower($attr["name"]) == "twitter:image") {
1118                                                 $text = "[img]" . $attr["content"] . "[/img]";
1119                                         }
1120                                 }
1121                         }
1122                         Cache::set($match[1], $text);
1123                 }
1124
1125                 return $text;
1126         }
1127
1128         public static function cleanPictureLinks($text)
1129         {
1130                 $return = preg_replace_callback("&\[url=([^\[\]]*)\]\[img\](.*)\[\/img\]\[\/url\]&Usi", 'self::cleanPictureLinksCallback', $text);
1131                 return $return;
1132         }
1133
1134         /**
1135          * @brief Converts a BBCode message to HTML message
1136          *
1137          * BBcode 2 HTML was written by WAY2WEB.net
1138          * extended to work with Mistpark/Friendica - Mike Macgirvin
1139          *
1140          * Simple HTML values meaning:
1141          * - 0: Friendica display
1142          * - 1: Unused
1143          * - 2: Used for Google+, Windows Phone push, Friendica API
1144          * - 3: Used before converting to Markdown in bb2diaspora.php
1145          * - 4: Used for WordPress, Libertree (before Markdown), pump.io and tumblr
1146          * - 5: Unused
1147          * - 6: Unused
1148          * - 7: Used for dfrn, OStatus
1149          * - 8: Used for WP backlink text setting
1150          *
1151          * @param string $text
1152          * @param bool   $try_oembed
1153          * @param int    $simple_html
1154          * @param bool   $for_plaintext
1155          * @return string
1156          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1157          */
1158         public static function convert($text, $try_oembed = true, $simple_html = 0, $for_plaintext = false)
1159         {
1160                 $a = self::getApp();
1161
1162                 /*
1163                  * preg_match_callback function to replace potential Oembed tags with Oembed content
1164                  *
1165                  * $match[0] = [tag]$url[/tag] or [tag=$url]$title[/tag]
1166                  * $match[1] = $url
1167                  * $match[2] = $title or absent
1168                  */
1169                 $try_oembed_callback = function ($match)
1170                 {
1171                         $url = $match[1];
1172                         $title = defaults($match, 2, null);
1173
1174                         try {
1175                                 $return = OEmbed::getHTML($url, $title);
1176                         } catch (Exception $ex) {
1177                                 $return = $match[0];
1178                         }
1179
1180                         return $return;
1181                 };
1182
1183                 // Extracting multi-line code blocks before the whitespace processing
1184                 $codeblocks = [];
1185
1186                 $text = preg_replace_callback("#\[code(?:=([^\]]*))?\](.*?)\[\/code\]#ism",
1187                         function ($matches) use (&$codeblocks) {
1188                                 $return = $matches[0];
1189                                 if (strpos($matches[2], "\n") !== false) {
1190                                         $return = '#codeblock-' . count($codeblocks) . '#';
1191
1192                                         $codeblocks[] =  '<pre><code class="language-' . trim($matches[1]) . '">' . trim($matches[2], "\n\r") . '</code></pre>';
1193                                 }
1194                                 return $return;
1195                         },
1196                         $text
1197                 );
1198
1199                 // Hide all [noparse] contained bbtags by spacefying them
1200                 // POSSIBLE BUG --> Will the 'preg' functions crash if there's an embedded image?
1201
1202                 $text = preg_replace_callback("/\[noparse\](.*?)\[\/noparse\]/ism", 'self::escapeNoparseCallback', $text);
1203                 $text = preg_replace_callback("/\[nobb\](.*?)\[\/nobb\]/ism", 'self::escapeNoparseCallback', $text);
1204                 $text = preg_replace_callback("/\[pre\](.*?)\[\/pre\]/ism", 'self::escapeNoparseCallback', $text);
1205
1206                 // Remove the abstract element. It is a non visible element.
1207                 $text = self::stripAbstract($text);
1208
1209                 // Move all spaces out of the tags
1210                 $text = preg_replace("/\[(\w*)\](\s*)/ism", '$2[$1]', $text);
1211                 $text = preg_replace("/(\s*)\[\/(\w*)\]/ism", '[/$2]$1', $text);
1212
1213                 // Extract the private images which use data urls since preg has issues with
1214                 // large data sizes. Stash them away while we do bbcode conversion, and then put them back
1215                 // in after we've done all the regex matching. We cannot use any preg functions to do this.
1216
1217                 $extracted = self::extractImagesFromItemBody($text);
1218                 $text = $extracted['body'];
1219                 $saved_image = $extracted['images'];
1220
1221                 // If we find any event code, turn it into an event.
1222                 // After we're finished processing the bbcode we'll
1223                 // replace all of the event code with a reformatted version.
1224
1225                 $ev = Event::fromBBCode($text);
1226
1227                 // Replace any html brackets with HTML Entities to prevent executing HTML or script
1228                 // Don't use strip_tags here because it breaks [url] search by replacing & with amp
1229
1230                 $text = str_replace("<", "&lt;", $text);
1231                 $text = str_replace(">", "&gt;", $text);
1232
1233                 // remove some newlines before the general conversion
1234                 $text = preg_replace("/\s?\[share(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism", "[share$1]$2[/share]", $text);
1235                 $text = preg_replace("/\s?\[quote(.*?)\]\s?(.*?)\s?\[\/quote\]\s?/ism", "[quote$1]$2[/quote]", $text);
1236
1237                 // when the content is meant exporting to other systems then remove the avatar picture since this doesn't really look good on these systems
1238                 if (!$try_oembed) {
1239                         $text = preg_replace("/\[share(.*?)avatar\s?=\s?'.*?'\s?(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism", "\n[share$1$2]$3[/share]", $text);
1240                 }
1241
1242                 // Convert new line chars to html <br /> tags
1243
1244                 // nlbr seems to be hopelessly messed up
1245                 //      $Text = nl2br($Text);
1246
1247                 // We'll emulate it.
1248
1249                 $text = trim($text);
1250                 $text = str_replace("\r\n", "\n", $text);
1251
1252                 // removing multiplicated newlines
1253                 if (Config::get("system", "remove_multiplicated_lines")) {
1254                         $search = ["\n\n\n", "\n ", " \n", "[/quote]\n\n", "\n[/quote]", "[/li]\n", "\n[li]", "\n[ul]", "[/ul]\n", "\n\n[share ", "[/attachment]\n",
1255                                         "\n[h1]", "[/h1]\n", "\n[h2]", "[/h2]\n", "\n[h3]", "[/h3]\n", "\n[h4]", "[/h4]\n", "\n[h5]", "[/h5]\n", "\n[h6]", "[/h6]\n"];
1256                         $replace = ["\n\n", "\n", "\n", "[/quote]\n", "[/quote]", "[/li]", "[li]", "[ul]", "[/ul]", "\n[share ", "[/attachment]",
1257                                         "[h1]", "[/h1]", "[h2]", "[/h2]", "[h3]", "[/h3]", "[h4]", "[/h4]", "[h5]", "[/h5]", "[h6]", "[/h6]"];
1258                         do {
1259                                 $oldtext = $text;
1260                                 $text = str_replace($search, $replace, $text);
1261                         } while ($oldtext != $text);
1262                 }
1263
1264                 // Set up the parameters for a URL search string
1265                 $URLSearchString = "^\[\]";
1266                 // Set up the parameters for a MAIL search string
1267                 $MAILSearchString = $URLSearchString;
1268
1269                 // if the HTML is used to generate plain text, then don't do this search, but replace all URL of that kind to text
1270                 if (!$for_plaintext) {
1271                         // Autolink feature (thanks to http://code.seebz.net/p/autolink-php/)
1272                         // Currently disabled, since the function is too greedy
1273                         // $autolink_regex = "`([^\]\=\"']|^)(https?\://[^\s<]+[^\s<\.\)])`ism";
1274                         $autolink_regex = "/([^\]\='".'"'."]|^)(https?\:\/\/[a-zA-Z0-9\:\/\-\?\&\;\.\=\_\~\#\%\$\!\+\,]+)/ism";
1275                         $text = preg_replace($autolink_regex, '$1[url]$2[/url]', $text);
1276                         if ($simple_html == 7) {
1277                                 $text = preg_replace_callback("/\[url\]([$URLSearchString]*)\[\/url\]/ism", 'self::convertUrlForOStatusCallback', $text);
1278                                 $text = preg_replace_callback("/\[url\=([$URLSearchString]*)\]([$URLSearchString]*)\[\/url\]/ism", 'self::convertUrlForOStatusCallback', $text);
1279                         }
1280                 } else {
1281                         $text = preg_replace("(\[url\]([$URLSearchString]*)\[\/url\])ism", " $1 ", $text);
1282                         $text = preg_replace_callback("&\[url=([^\[\]]*)\]\[img\](.*)\[\/img\]\[\/url\]&Usi", 'self::removePictureLinksCallback', $text);
1283                 }
1284
1285
1286                 // Handle attached links or videos
1287                 $text = self::convertAttachment($text, $simple_html, $try_oembed);
1288
1289                 $text = str_replace(["\r","\n"], ['<br />', '<br />'], $text);
1290
1291                 // Remove all hashtag addresses
1292                 if ((!$try_oembed || $simple_html) && !in_array($simple_html, [3, 7])) {
1293                         $text = preg_replace("/([#@!])\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism", '$1$3', $text);
1294                 } elseif ($simple_html == 3) {
1295                         // The ! is converted to @ since Diaspora only understands the @
1296                         $text = preg_replace("/([@!])\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1297                                 '@<a href="$2">$3</a>',
1298                                 $text);
1299                 } elseif ($simple_html == 7) {
1300                         $text = preg_replace("/([@!])\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1301                                 '$1<span class="vcard"><a href="$2" class="url u-url mention" title="$3"><span class="fn nickname mention">$3</span></a></span>',
1302                                 $text);
1303                 } elseif (!$simple_html) {
1304                         $text = preg_replace("/([@!])\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1305                                 '$1<a href="$2" class="userinfo mention" title="$3">$3</a>',
1306                                 $text);
1307                 }
1308
1309                 // Bookmarks in red - will be converted to bookmarks in friendica
1310                 $text = preg_replace("/#\^\[url\]([$URLSearchString]*)\[\/url\]/ism", '[bookmark=$1]$1[/bookmark]', $text);
1311                 $text = preg_replace("/#\^\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism", '[bookmark=$1]$2[/bookmark]', $text);
1312                 $text = preg_replace("/#\[url\=[$URLSearchString]*\]\^\[\/url\]\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/i",
1313                                         "[bookmark=$1]$2[/bookmark]", $text);
1314
1315                 if (in_array($simple_html, [2, 6, 7, 8, 9])) {
1316                         $text = preg_replace_callback("/([^#@!])\[url\=([^\]]*)\](.*?)\[\/url\]/ism", "self::expandLinksCallback", $text);
1317                         //$Text = preg_replace("/[^#@!]\[url\=([^\]]*)\](.*?)\[\/url\]/ism", ' $2 [url]$1[/url]', $Text);
1318                         $text = preg_replace("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/ism", ' $2 [url]$1[/url]',$text);
1319                 }
1320
1321                 if ($simple_html == 5) {
1322                         $text = preg_replace("/[^#@!]\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism", '[url]$1[/url]', $text);
1323                 }
1324
1325                 // Perform URL Search
1326                 if ($try_oembed) {
1327                         $text = preg_replace_callback("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/ism", $try_oembed_callback, $text);
1328                 }
1329
1330                 if ($simple_html == 5) {
1331                         $text = preg_replace("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/ism", '[url]$1[/url]', $text);
1332                 } else {
1333                         $text = preg_replace("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/ism", '[url=$1]$2[/url]', $text);
1334                 }
1335
1336                 // Handle Diaspora posts
1337                 $text = preg_replace_callback(
1338                         "&\[url=/?posts/([^\[\]]*)\](.*)\[\/url\]&Usi",
1339                         function ($match) {
1340                                 return "[url=" . System::baseUrl() . "/display/" . $match[1] . "]" . $match[2] . "[/url]";
1341                         }, $text
1342                 );
1343
1344                 $text = preg_replace_callback(
1345                         "&\[url=/people\?q\=(.*)\](.*)\[\/url\]&Usi",
1346                         function ($match) {
1347                                 return "[url=" . System::baseUrl() . "/search?search=%40" . $match[1] . "]" . $match[2] . "[/url]";
1348                         }, $text
1349                 );
1350
1351                 // Server independent link to posts and comments
1352                 // See issue: https://github.com/diaspora/diaspora_federation/issues/75
1353                 $expression = "=diaspora://.*?/post/([0-9A-Za-z\-_@.:]{15,254}[0-9A-Za-z])=ism";
1354                 $text = preg_replace($expression, System::baseUrl()."/display/$1", $text);
1355
1356                 /* Tag conversion
1357                  * Supports:
1358                  * - #[url=<anything>]<term>[/url]
1359                  * - [url=<anything>]#<term>[/url]
1360                  */
1361                 $text = preg_replace_callback("/(?:#\[url\=[$URLSearchString]*\]|\[url\=[$URLSearchString]*\]#)(.*?)\[\/url\]/ism", function($matches) {
1362                         return '#<a href="'
1363                                 . System::baseUrl()     . '/search?tag=' . rawurlencode($matches[1])
1364                                 . '" class="tag" title="' . XML::escape($matches[1]) . '">'
1365                                 . XML::escape($matches[1])
1366                                 . '</a>';
1367                 }, $text);
1368
1369                 // We need no target="_blank" for local links
1370                 // convert links start with System::baseUrl() as local link without the target="_blank" attribute
1371                 $escapedBaseUrl = preg_quote(System::baseUrl(), '/');
1372                 $text = preg_replace("/\[url\](".$escapedBaseUrl."[$URLSearchString]*)\[\/url\]/ism", '<a href="$1">$1</a>', $text);
1373                 $text = preg_replace("/\[url\=(".$escapedBaseUrl."[$URLSearchString]*)\](.*?)\[\/url\]/ism", '<a href="$1">$2</a>', $text);
1374
1375                 $text = preg_replace("/\[url\]([$URLSearchString]*)\[\/url\]/ism", '<a href="$1" target="_blank">$1</a>', $text);
1376                 $text = preg_replace("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism", '<a href="$1" target="_blank">$2</a>', $text);
1377
1378                 // Red compatibility, though the link can't be authenticated on Friendica
1379                 $text = preg_replace("/\[zrl\=([$URLSearchString]*)\](.*?)\[\/zrl\]/ism", '<a href="$1" target="_blank">$2</a>', $text);
1380
1381
1382                 // we may need to restrict this further if it picks up too many strays
1383                 // link acct:user@host to a webfinger profile redirector
1384
1385                 $text = preg_replace('/acct:([^@]+)@((?!\-)(?:[a-zA-Z\d\-]{0,62}[a-zA-Z\d]\.){1,126}(?!\d+)[a-zA-Z\d]{1,63})/', '<a href="' . System::baseUrl() . '/acctlink?addr=$1@$2" target="extlink">acct:$1@$2</a>', $text);
1386
1387                 // Perform MAIL Search
1388                 $text = preg_replace("/\[mail\]([$MAILSearchString]*)\[\/mail\]/", '<a href="mailto:$1">$1</a>', $text);
1389                 $text = preg_replace("/\[mail\=([$MAILSearchString]*)\](.*?)\[\/mail\]/", '<a href="mailto:$1">$2</a>', $text);
1390
1391                 // leave open the posibility of [map=something]
1392                 // this is replaced in Item::prepareBody() which has knowledge of the item location
1393
1394                 if (strpos($text, '[/map]') !== false) {
1395                         $text = preg_replace_callback(
1396                                 "/\[map\](.*?)\[\/map\]/ism",
1397                                 function ($match) use ($simple_html) {
1398                                         return str_replace($match[0], '<p class="map">' . Map::byLocation($match[1], $simple_html) . '</p>', $match[0]);
1399                                 },
1400                                 $text
1401                         );
1402                 }
1403                 if (strpos($text, '[map=') !== false) {
1404                         $text = preg_replace_callback(
1405                                 "/\[map=(.*?)\]/ism",
1406                                 function ($match) use ($simple_html) {
1407                                         return str_replace($match[0], '<p class="map">' . Map::byCoordinates(str_replace('/', ' ', $match[1]), $simple_html) . '</p>', $match[0]);
1408                                 },
1409                                 $text
1410                         );
1411                 }
1412                 if (strpos($text, '[map]') !== false) {
1413                         $text = preg_replace("/\[map\]/", '<p class="map"></p>', $text);
1414                 }
1415
1416                 // Check for headers
1417                 $text = preg_replace("(\[h1\](.*?)\[\/h1\])ism", '<h1>$1</h1>', $text);
1418                 $text = preg_replace("(\[h2\](.*?)\[\/h2\])ism", '<h2>$1</h2>', $text);
1419                 $text = preg_replace("(\[h3\](.*?)\[\/h3\])ism", '<h3>$1</h3>', $text);
1420                 $text = preg_replace("(\[h4\](.*?)\[\/h4\])ism", '<h4>$1</h4>', $text);
1421                 $text = preg_replace("(\[h5\](.*?)\[\/h5\])ism", '<h5>$1</h5>', $text);
1422                 $text = preg_replace("(\[h6\](.*?)\[\/h6\])ism", '<h6>$1</h6>', $text);
1423
1424                 // Check for paragraph
1425                 $text = preg_replace("(\[p\](.*?)\[\/p\])ism", '<p>$1</p>', $text);
1426
1427                 // Check for bold text
1428                 $text = preg_replace("(\[b\](.*?)\[\/b\])ism", '<strong>$1</strong>', $text);
1429
1430                 // Check for Italics text
1431                 $text = preg_replace("(\[i\](.*?)\[\/i\])ism", '<em>$1</em>', $text);
1432
1433                 // Check for Underline text
1434                 $text = preg_replace("(\[u\](.*?)\[\/u\])ism", '<u>$1</u>', $text);
1435
1436                 // Check for strike-through text
1437                 $text = preg_replace("(\[s\](.*?)\[\/s\])ism", '<s>$1</s>', $text);
1438
1439                 // Check for over-line text
1440                 $text = preg_replace("(\[o\](.*?)\[\/o\])ism", '<span class="overline">$1</span>', $text);
1441
1442                 // Check for colored text
1443                 $text = preg_replace("(\[color=(.*?)\](.*?)\[\/color\])ism", "<span style=\"color: $1;\">$2</span>", $text);
1444
1445                 // Check for sized text
1446                 // [size=50] --> font-size: 50px (with the unit).
1447                 $text = preg_replace("(\[size=(\d*?)\](.*?)\[\/size\])ism", "<span style=\"font-size: $1px; line-height: initial;\">$2</span>", $text);
1448                 $text = preg_replace("(\[size=(.*?)\](.*?)\[\/size\])ism", "<span style=\"font-size: $1; line-height: initial;\">$2</span>", $text);
1449
1450                 // Check for centered text
1451                 $text = preg_replace("(\[center\](.*?)\[\/center\])ism", "<div style=\"text-align:center;\">$1</div>", $text);
1452
1453                 // Check for list text
1454                 $text = str_replace("[*]", "<li>", $text);
1455
1456                 // Check for style sheet commands
1457                 $text = preg_replace_callback(
1458                         "(\[style=(.*?)\](.*?)\[\/style\])ism",
1459                         function ($match) {
1460                                 return "<span style=\"" . HTML::sanitizeCSS($match[1]) . ";\">" . $match[2] . "</span>";
1461                         },
1462                         $text
1463                 );
1464
1465                 // Check for CSS classes
1466                 $text = preg_replace_callback(
1467                         "(\[class=(.*?)\](.*?)\[\/class\])ism",
1468                         function ($match) {
1469                                 return "<span class=\"" . HTML::sanitizeCSS($match[1]) . "\">" . $match[2] . "</span>";
1470                         },
1471                         $text
1472                 );
1473
1474                 // handle nested lists
1475                 $endlessloop = 0;
1476
1477                 while ((((strpos($text, "[/list]") !== false) && (strpos($text, "[list") !== false)) ||
1478                            ((strpos($text, "[/ol]") !== false) && (strpos($text, "[ol]") !== false)) ||
1479                            ((strpos($text, "[/ul]") !== false) && (strpos($text, "[ul]") !== false)) ||
1480                            ((strpos($text, "[/li]") !== false) && (strpos($text, "[li]") !== false))) && (++$endlessloop < 20)) {
1481                         $text = preg_replace("/\[list\](.*?)\[\/list\]/ism", '<ul class="listbullet" style="list-style-type: circle;">$1</ul>', $text);
1482                         $text = preg_replace("/\[list=\](.*?)\[\/list\]/ism", '<ul class="listnone" style="list-style-type: none;">$1</ul>', $text);
1483                         $text = preg_replace("/\[list=1\](.*?)\[\/list\]/ism", '<ul class="listdecimal" style="list-style-type: decimal;">$1</ul>', $text);
1484                         $text = preg_replace("/\[list=((?-i)i)\](.*?)\[\/list\]/ism", '<ul class="listlowerroman" style="list-style-type: lower-roman;">$2</ul>', $text);
1485                         $text = preg_replace("/\[list=((?-i)I)\](.*?)\[\/list\]/ism", '<ul class="listupperroman" style="list-style-type: upper-roman;">$2</ul>', $text);
1486                         $text = preg_replace("/\[list=((?-i)a)\](.*?)\[\/list\]/ism", '<ul class="listloweralpha" style="list-style-type: lower-alpha;">$2</ul>', $text);
1487                         $text = preg_replace("/\[list=((?-i)A)\](.*?)\[\/list\]/ism", '<ul class="listupperalpha" style="list-style-type: upper-alpha;">$2</ul>', $text);
1488                         $text = preg_replace("/\[ul\](.*?)\[\/ul\]/ism", '<ul class="listbullet" style="list-style-type: circle;">$1</ul>', $text);
1489                         $text = preg_replace("/\[ol\](.*?)\[\/ol\]/ism", '<ul class="listdecimal" style="list-style-type: decimal;">$1</ul>', $text);
1490                         $text = preg_replace("/\[li\](.*?)\[\/li\]/ism", '<li>$1</li>', $text);
1491                 }
1492
1493                 $text = preg_replace("/\[th\](.*?)\[\/th\]/sm", '<th>$1</th>', $text);
1494                 $text = preg_replace("/\[td\](.*?)\[\/td\]/sm", '<td>$1</td>', $text);
1495                 $text = preg_replace("/\[tr\](.*?)\[\/tr\]/sm", '<tr>$1</tr>', $text);
1496                 $text = preg_replace("/\[table\](.*?)\[\/table\]/sm", '<table>$1</table>', $text);
1497
1498                 $text = preg_replace("/\[table border=1\](.*?)\[\/table\]/sm", '<table border="1" >$1</table>', $text);
1499                 $text = preg_replace("/\[table border=0\](.*?)\[\/table\]/sm", '<table border="0" >$1</table>', $text);
1500
1501                 $text = str_replace('[hr]', '<hr />', $text);
1502
1503                 // This is actually executed in Item::prepareBody()
1504
1505                 $text = str_replace('[nosmile]', '', $text);
1506
1507                 // Check for font change text
1508                 $text = preg_replace("/\[font=(.*?)\](.*?)\[\/font\]/sm", "<span style=\"font-family: $1;\">$2</span>", $text);
1509
1510                 // Declare the format for [code] layout
1511
1512                 $CodeLayout = '<code>$1</code>';
1513                 // Check for [code] text
1514                 $text = preg_replace("/\[code\](.*?)\[\/code\]/ism", "$CodeLayout", $text);
1515
1516                 // Declare the format for [spoiler] layout
1517                 $SpoilerLayout = '<blockquote class="spoiler">$1</blockquote>';
1518
1519                 // Check for [spoiler] text
1520                 // handle nested quotes
1521                 $endlessloop = 0;
1522                 while ((strpos($text, "[/spoiler]") !== false) && (strpos($text, "[spoiler]") !== false) && (++$endlessloop < 20)) {
1523                         $text = preg_replace("/\[spoiler\](.*?)\[\/spoiler\]/ism", "$SpoilerLayout", $text);
1524                 }
1525
1526                 // Check for [spoiler=Author] text
1527
1528                 $t_wrote = L10n::t('$1 wrote:');
1529
1530                 // handle nested quotes
1531                 $endlessloop = 0;
1532                 while ((strpos($text, "[/spoiler]")!== false)  && (strpos($text, "[spoiler=") !== false) && (++$endlessloop < 20)) {
1533                         $text = preg_replace("/\[spoiler=[\"\']*(.*?)[\"\']*\](.*?)\[\/spoiler\]/ism",
1534                                                  "<br /><strong class=".'"spoiler"'.">" . $t_wrote . "</strong><blockquote class=".'"spoiler"'.">$2</blockquote>",
1535                                                  $text);
1536                 }
1537
1538                 // Declare the format for [quote] layout
1539                 $QuoteLayout = '<blockquote>$1</blockquote>';
1540
1541                 // Check for [quote] text
1542                 // handle nested quotes
1543                 $endlessloop = 0;
1544                 while ((strpos($text, "[/quote]") !== false) && (strpos($text, "[quote]") !== false) && (++$endlessloop < 20)) {
1545                         $text = preg_replace("/\[quote\](.*?)\[\/quote\]/ism", "$QuoteLayout", $text);
1546                 }
1547
1548                 // Check for [quote=Author] text
1549
1550                 $t_wrote = L10n::t('$1 wrote:');
1551
1552                 // handle nested quotes
1553                 $endlessloop = 0;
1554                 while ((strpos($text, "[/quote]")!== false)  && (strpos($text, "[quote=") !== false) && (++$endlessloop < 20)) {
1555                         $text = preg_replace("/\[quote=[\"\']*(.*?)[\"\']*\](.*?)\[\/quote\]/ism",
1556                                                  "<p><strong class=".'"author"'.">" . $t_wrote . "</strong></p><blockquote>$2</blockquote>",
1557                                                  $text);
1558                 }
1559
1560
1561                 // [img=widthxheight]image source[/img]
1562                 $text = preg_replace_callback(
1563                         "/\[img\=([0-9]*)x([0-9]*)\](.*?)\[\/img\]/ism",
1564                         function ($matches) use ($simple_html) {
1565                                 if (strpos($matches[3], "data:image/") === 0) {
1566                                         return $matches[0];
1567                                 }
1568
1569                                 $matches[3] = self::proxyUrl($matches[3], $simple_html);
1570                                 return "[img=" . $matches[1] . "x" . $matches[2] . "]" . $matches[3] . "[/img]";
1571                         },
1572                         $text
1573                 );
1574
1575                 $text = preg_replace("/\[img\=([0-9]*)x([0-9]*)\](.*?)\[\/img\]/ism", '<img src="$3" style="width: $1px;" >', $text);
1576                 $text = preg_replace("/\[zmg\=([0-9]*)x([0-9]*)\](.*?)\[\/zmg\]/ism", '<img class="zrl" src="$3" style="width: $1px;" >', $text);
1577
1578                 $text = preg_replace_callback("/\[img\=([$URLSearchString]*)\](.*?)\[\/img\]/ism",
1579                         function ($matches) use ($simple_html) {
1580                                 $matches[1] = self::proxyUrl($matches[1], $simple_html);
1581                                 $matches[2] = htmlspecialchars($matches[2], ENT_COMPAT);
1582                                 return '<img src="' . $matches[1] . '" alt="' . $matches[2] . '">';
1583                         },
1584                         $text);
1585
1586                 // Images
1587                 // [img]pathtoimage[/img]
1588                 $text = preg_replace_callback(
1589                         "/\[img\](.*?)\[\/img\]/ism",
1590                         function ($matches) use ($simple_html) {
1591                                 if (strpos($matches[1], "data:image/") === 0) {
1592                                         return $matches[0];
1593                                 }
1594
1595                                 $matches[1] = self::proxyUrl($matches[1], $simple_html);
1596                                 return "[img]" . $matches[1] . "[/img]";
1597                         },
1598                         $text
1599                 );
1600
1601                 $text = preg_replace("/\[img\](.*?)\[\/img\]/ism", '<img src="$1" alt="' . L10n::t('Image/photo') . '" />', $text);
1602                 $text = preg_replace("/\[zmg\](.*?)\[\/zmg\]/ism", '<img src="$1" alt="' . L10n::t('Image/photo') . '" />', $text);
1603
1604                 // Shared content
1605                 $text = self::convertShare(
1606                         $text,
1607                         function (array $attributes, array $author_contact, $content, $is_quote_share) use ($simple_html) {
1608                                 return self::convertShareCallback($attributes, $author_contact, $content, $is_quote_share, $simple_html);
1609                         }
1610                 );
1611
1612                 $text = preg_replace("/\[crypt\](.*?)\[\/crypt\]/ism", '<br/><img src="' .System::baseUrl() . '/images/lock_icon.gif" alt="' . L10n::t('Encrypted content') . '" title="' . L10n::t('Encrypted content') . '" /><br />', $text);
1613                 $text = preg_replace("/\[crypt(.*?)\](.*?)\[\/crypt\]/ism", '<br/><img src="' .System::baseUrl() . '/images/lock_icon.gif" alt="' . L10n::t('Encrypted content') . '" title="' . '$1' . ' ' . L10n::t('Encrypted content') . '" /><br />', $text);
1614                 //$Text = preg_replace("/\[crypt=(.*?)\](.*?)\[\/crypt\]/ism", '<br/><img src="' .System::baseUrl() . '/images/lock_icon.gif" alt="' . L10n::t('Encrypted content') . '" title="' . '$1' . ' ' . L10n::t('Encrypted content') . '" /><br />', $Text);
1615
1616                 // Try to Oembed
1617                 if ($try_oembed) {
1618                         $text = preg_replace("/\[video\](.*?\.(ogg|ogv|oga|ogm|webm|mp4).*?)\[\/video\]/ism", '<video src="$1" controls="controls" width="' . $a->videowidth . '" height="' . $a->videoheight . '" loop="true"><a href="$1">$1</a></video>', $text);
1619                         $text = preg_replace("/\[audio\](.*?\.(ogg|ogv|oga|ogm|webm|mp4|mp3).*?)\[\/audio\]/ism", '<audio src="$1" controls="controls"><a href="$1">$1</a></audio>', $text);
1620
1621                         $text = preg_replace_callback("/\[video\](.*?)\[\/video\]/ism", $try_oembed_callback, $text);
1622                         $text = preg_replace_callback("/\[audio\](.*?)\[\/audio\]/ism", $try_oembed_callback, $text);
1623                 } else {
1624                         $text = preg_replace("/\[video\](.*?)\[\/video\]/ism",
1625                                                 '<a href="$1" target="_blank">$1</a>', $text);
1626                         $text = preg_replace("/\[audio\](.*?)\[\/audio\]/ism",
1627                                                 '<a href="$1" target="_blank">$1</a>', $text);
1628                 }
1629
1630                 // html5 video and audio
1631
1632
1633                 if ($try_oembed) {
1634                         $text = preg_replace("/\[iframe\](.*?)\[\/iframe\]/ism", '<iframe src="$1" width="' . $a->videowidth . '" height="' . $a->videoheight . '"><a href="$1">$1</a></iframe>', $text);
1635                 } else {
1636                         $text = preg_replace("/\[iframe\](.*?)\[\/iframe\]/ism", '<a href="$1">$1</a>', $text);
1637                 }
1638
1639                 // Youtube extensions
1640                 if ($try_oembed) {
1641                         $text = preg_replace_callback("/\[youtube\](https?:\/\/www.youtube.com\/watch\?v\=.*?)\[\/youtube\]/ism", $try_oembed_callback, $text);
1642                         $text = preg_replace_callback("/\[youtube\](www.youtube.com\/watch\?v\=.*?)\[\/youtube\]/ism", $try_oembed_callback, $text);
1643                         $text = preg_replace_callback("/\[youtube\](https?:\/\/youtu.be\/.*?)\[\/youtube\]/ism", $try_oembed_callback, $text);
1644                 }
1645
1646                 $text = preg_replace("/\[youtube\]https?:\/\/www.youtube.com\/watch\?v\=(.*?)\[\/youtube\]/ism", '[youtube]$1[/youtube]', $text);
1647                 $text = preg_replace("/\[youtube\]https?:\/\/www.youtube.com\/embed\/(.*?)\[\/youtube\]/ism", '[youtube]$1[/youtube]', $text);
1648                 $text = preg_replace("/\[youtube\]https?:\/\/youtu.be\/(.*?)\[\/youtube\]/ism", '[youtube]$1[/youtube]', $text);
1649
1650                 if ($try_oembed) {
1651                         $text = preg_replace("/\[youtube\]([A-Za-z0-9\-_=]+)(.*?)\[\/youtube\]/ism", '<iframe width="' . $a->videowidth . '" height="' . $a->videoheight . '" src="https://www.youtube.com/embed/$1" frameborder="0" ></iframe>', $text);
1652                 } else {
1653                         $text = preg_replace("/\[youtube\]([A-Za-z0-9\-_=]+)(.*?)\[\/youtube\]/ism",
1654                                                 '<a href="https://www.youtube.com/watch?v=$1" target="_blank">https://www.youtube.com/watch?v=$1</a>', $text);
1655                 }
1656
1657                 if ($try_oembed) {
1658                         $text = preg_replace_callback("/\[vimeo\](https?:\/\/player.vimeo.com\/video\/[0-9]+).*?\[\/vimeo\]/ism", $try_oembed_callback, $text);
1659                         $text = preg_replace_callback("/\[vimeo\](https?:\/\/vimeo.com\/[0-9]+).*?\[\/vimeo\]/ism", $try_oembed_callback, $text);
1660                 }
1661
1662                 $text = preg_replace("/\[vimeo\]https?:\/\/player.vimeo.com\/video\/([0-9]+)(.*?)\[\/vimeo\]/ism", '[vimeo]$1[/vimeo]', $text);
1663                 $text = preg_replace("/\[vimeo\]https?:\/\/vimeo.com\/([0-9]+)(.*?)\[\/vimeo\]/ism", '[vimeo]$1[/vimeo]', $text);
1664
1665                 if ($try_oembed) {
1666                         $text = preg_replace("/\[vimeo\]([0-9]+)(.*?)\[\/vimeo\]/ism", '<iframe width="' . $a->videowidth . '" height="' . $a->videoheight . '" src="https://player.vimeo.com/video/$1" frameborder="0" ></iframe>', $text);
1667                 } else {
1668                         $text = preg_replace("/\[vimeo\]([0-9]+)(.*?)\[\/vimeo\]/ism",
1669                                                 '<a href="https://vimeo.com/$1" target="_blank">https://vimeo.com/$1</a>', $text);
1670                 }
1671
1672                 // oembed tag
1673                 $text = OEmbed::BBCode2HTML($text);
1674
1675                 // Avoid triple linefeeds through oembed
1676                 $text = str_replace("<br style='clear:left'></span><br /><br />", "<br style='clear:left'></span><br />", $text);
1677
1678                 // If we found an event earlier, strip out all the event code and replace with a reformatted version.
1679                 // Replace the event-start section with the entire formatted event. The other bbcode is stripped.
1680                 // Summary (e.g. title) is required, earlier revisions only required description (in addition to
1681                 // start which is always required). Allow desc with a missing summary for compatibility.
1682
1683                 if ((!empty($ev['desc']) || !empty($ev['summary'])) && !empty($ev['start'])) {
1684                         $sub = Event::getHTML($ev, $simple_html);
1685
1686                         $text = preg_replace("/\[event\-summary\](.*?)\[\/event\-summary\]/ism", '', $text);
1687                         $text = preg_replace("/\[event\-description\](.*?)\[\/event\-description\]/ism", '', $text);
1688                         $text = preg_replace("/\[event\-start\](.*?)\[\/event\-start\]/ism", $sub, $text);
1689                         $text = preg_replace("/\[event\-finish\](.*?)\[\/event\-finish\]/ism", '', $text);
1690                         $text = preg_replace("/\[event\-location\](.*?)\[\/event\-location\]/ism", '', $text);
1691                         $text = preg_replace("/\[event\-adjust\](.*?)\[\/event\-adjust\]/ism", '', $text);
1692                         $text = preg_replace("/\[event\-id\](.*?)\[\/event\-id\]/ism", '', $text);
1693                 }
1694
1695                 // Replace non graphical smilies for external posts
1696                 if ($simple_html) {
1697                         $text = Smilies::replace($text);
1698                 }
1699
1700                 // Unhide all [noparse] contained bbtags unspacefying them
1701                 // and triming the [noparse] tag.
1702
1703                 $text = preg_replace_callback("/\[noparse\](.*?)\[\/noparse\]/ism", 'self::unescapeNoparseCallback', $text);
1704                 $text = preg_replace_callback("/\[nobb\](.*?)\[\/nobb\]/ism", 'self::unescapeNoparseCallback', $text);
1705                 $text = preg_replace_callback("/\[pre\](.*?)\[\/pre\]/ism", 'self::unescapeNoparseCallback', $text);
1706
1707                 /// @todo What is the meaning of these lines?
1708                 $text = preg_replace('/\[\&amp\;([#a-z0-9]+)\;\]/', '&$1;', $text);
1709                 $text = preg_replace('/\&\#039\;/', '\'', $text);
1710
1711                 // Currently deactivated, it made problems with " inside of alt texts.
1712                 //$text = preg_replace('/\&quot\;/', '"', $text);
1713
1714                 // fix any escaped ampersands that may have been converted into links
1715                 $text = preg_replace('/\<([^>]*?)(src|href)=(.*?)\&amp\;(.*?)\>/ism', '<$1$2=$3&$4>', $text);
1716
1717                 // sanitizes src attributes (http and redir URLs for displaying in a web page, cid used for inline images in emails)
1718                 $allowed_src_protocols = ['http', 'redir', 'cid'];
1719                 $text = preg_replace('#<([^>]*?)(src)="(?!' . implode('|', $allowed_src_protocols) . ')(.*?)"(.*?)>#ism',
1720                                          '<$1$2=""$4 data-original-src="$3" class="invalid-src" title="' . L10n::t('Invalid source protocol') . '">', $text);
1721
1722                 // sanitize href attributes (only whitelisted protocols URLs)
1723                 // default value for backward compatibility
1724                 $allowed_link_protocols = Config::get('system', 'allowed_link_protocols', ['ftp', 'mailto', 'gopher', 'cid']);
1725
1726                 // Always allowed protocol even if config isn't set or not including it
1727                 $allowed_link_protocols[] = 'http';
1728                 $allowed_link_protocols[] = 'redir/';
1729
1730                 $regex = '#<([^>]*?)(href)="(?!' . implode('|', $allowed_link_protocols) . ')(.*?)"(.*?)>#ism';
1731                 $text = preg_replace($regex, '<$1$2="javascript:void(0)"$4 data-original-href="$3" class="invalid-href" title="' . L10n::t('Invalid link protocol') . '">', $text);
1732
1733                 if ($saved_image) {
1734                         $text = self::interpolateSavedImagesIntoItemBody($text, $saved_image);
1735                 }
1736
1737                 // Restore code blocks
1738                 $text = preg_replace_callback('/#codeblock-([0-9]+)#/iU',
1739                         function ($matches) use ($codeblocks) {
1740                                 $return = $matches[0];
1741                                 if (isset($codeblocks[intval($matches[1])])) {
1742                                         $return = $codeblocks[$matches[1]];
1743                                 }
1744                                 return $return;
1745                         },
1746                         $text
1747                 );
1748
1749                 // Clean up the HTML by loading and saving the HTML with the DOM.
1750                 // Bad structured html can break a whole page.
1751                 // For performance reasons do it only with activated item cache or at export.
1752                 if (!$try_oembed || (get_itemcachepath() != "")) {
1753                         $doc = new DOMDocument();
1754                         $doc->preserveWhiteSpace = false;
1755
1756                         $text = mb_convert_encoding($text, 'HTML-ENTITIES', "UTF-8");
1757
1758                         $doctype = '<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd">';
1759                         $encoding = '<?xml encoding="UTF-8">';
1760                         @$doc->loadHTML($encoding.$doctype."<html><body>".$text."</body></html>");
1761                         $doc->encoding = 'UTF-8';
1762                         $text = $doc->saveHTML();
1763                         $text = str_replace(["<html><body>", "</body></html>", $doctype, $encoding], ["", "", "", ""], $text);
1764
1765                         $text = str_replace('<br></li>', '</li>', $text);
1766
1767                         //$Text = mb_convert_encoding($Text, "UTF-8", 'HTML-ENTITIES');
1768                 }
1769
1770                 // Clean up some useless linebreaks in lists
1771                 //$Text = str_replace('<br /><ul', '<ul ', $Text);
1772                 //$Text = str_replace('</ul><br />', '</ul>', $Text);
1773                 //$Text = str_replace('</li><br />', '</li>', $Text);
1774                 //$Text = str_replace('<br /><li>', '<li>', $Text);
1775                 //$Text = str_replace('<br /><ul', '<ul ', $Text);
1776
1777                 Hook::callAll('bbcode', $text);
1778
1779                 return trim($text);
1780         }
1781
1782         /**
1783          * @brief Strips the "abstract" tag from the provided text
1784          *
1785          * @param string $text The text with BBCode
1786          * @return string The same text - but without "abstract" element
1787          */
1788         public static function stripAbstract($text)
1789         {
1790                 $text = preg_replace("/[\s|\n]*\[abstract\].*?\[\/abstract\][\s|\n]*/ism", '', $text);
1791                 $text = preg_replace("/[\s|\n]*\[abstract=.*?\].*?\[\/abstract][\s|\n]*/ism", '', $text);
1792
1793                 return $text;
1794         }
1795
1796         /**
1797          * @brief Returns the value of the "abstract" element
1798          *
1799          * @param string $text The text that maybe contains the element
1800          * @param string $addon The addon for which the abstract is meant for
1801          * @return string The abstract
1802          */
1803         public static function getAbstract($text, $addon = "")
1804         {
1805                 $abstract = "";
1806                 $abstracts = [];
1807                 $addon = strtolower($addon);
1808
1809                 if (preg_match_all("/\[abstract=(.*?)\](.*?)\[\/abstract\]/ism", $text, $results, PREG_SET_ORDER)) {
1810                         foreach ($results AS $result) {
1811                                 $abstracts[strtolower($result[1])] = $result[2];
1812                         }
1813                 }
1814
1815                 if (isset($abstracts[$addon])) {
1816                         $abstract = $abstracts[$addon];
1817                 }
1818
1819                 if ($abstract == "" && preg_match("/\[abstract\](.*?)\[\/abstract\]/ism", $text, $result)) {
1820                         $abstract = $result[1];
1821                 }
1822
1823                 return $abstract;
1824         }
1825
1826         /**
1827          * @brief Callback function to replace a Friendica style mention in a mention for Diaspora
1828          *
1829          * @param array $match Matching values for the callback
1830          *                     [1] = Mention type (! or @)
1831          *                     [2] = Name
1832          *                     [3] = Address
1833          * @return string Replaced mention
1834          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1835          * @throws \ImagickException
1836          */
1837         private static function bbCodeMention2DiasporaCallback($match)
1838         {
1839                 $contact = Contact::getDetailsByURL($match[3]);
1840
1841                 if (empty($contact['addr'])) {
1842                         $contact = Probe::uri($match[3]);
1843                 }
1844
1845                 if (empty($contact['addr'])) {
1846                         return $match[0];
1847                 }
1848
1849                 $mention = $match[1] . '{' . $match[2] . '; ' . $contact['addr'] . '}';
1850                 return $mention;
1851         }
1852
1853         /**
1854          * @brief Converts a BBCode text into Markdown
1855          *
1856          * This function converts a BBCode item body to be sent to Markdown-enabled
1857          * systems like Diaspora and Libertree
1858          *
1859          * @param string $text
1860          * @param bool   $for_diaspora Diaspora requires more changes than Libertree
1861          * @return string
1862          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1863          */
1864         public static function toMarkdown($text, $for_diaspora = true)
1865         {
1866                 $a = self::getApp();
1867
1868                 $original_text = $text;
1869
1870                 // Since Diaspora is creating a summary for links, this function removes them before posting
1871                 if ($for_diaspora) {
1872                         $text = self::removeShareInformation($text);
1873                 }
1874
1875                 /**
1876                  * Transform #tags, strip off the [url] and replace spaces with underscore
1877                  */
1878                 $url_search_string = "^\[\]";
1879                 $text = preg_replace_callback("/#\[url\=([$url_search_string]*)\](.*?)\[\/url\]/i",
1880                         function ($matches) {
1881                                 return '#' . str_replace(' ', '_', $matches[2]);
1882                         },
1883                         $text
1884                 );
1885
1886                 // Converting images with size parameters to simple images. Markdown doesn't know it.
1887                 $text = preg_replace("/\[img\=([0-9]*)x([0-9]*)\](.*?)\[\/img\]/ism", '[img]$3[/img]', $text);
1888
1889                 // Convert it to HTML - don't try oembed
1890                 if ($for_diaspora) {
1891                         $text = self::convert($text, false, 3);
1892
1893                         // Add all tags that maybe were removed
1894                         if (preg_match_all("/#\[url\=([$url_search_string]*)\](.*?)\[\/url\]/ism", $original_text, $tags)) {
1895                                 $tagline = "";
1896                                 foreach ($tags[2] as $tag) {
1897                                         $tag = html_entity_decode($tag, ENT_QUOTES, 'UTF-8');
1898                                         if (!strpos(html_entity_decode($text, ENT_QUOTES, 'UTF-8'), '#' . $tag)) {
1899                                                 $tagline .= '#' . $tag . ' ';
1900                                         }
1901                                 }
1902                                 $text = $text . " " . $tagline;
1903                         }
1904                 } else {
1905                         $text = self::convert($text, false, 4);
1906                 }
1907
1908                 // mask some special HTML chars from conversation to markdown
1909                 $text = str_replace(['&lt;', '&gt;', '&amp;'], ['&_lt_;', '&_gt_;', '&_amp_;'], $text);
1910
1911                 // If a link is followed by a quote then there should be a newline before it
1912                 // Maybe we should make this newline at every time before a quote.
1913                 $text = str_replace(["</a><blockquote>"], ["</a><br><blockquote>"], $text);
1914
1915                 $stamp1 = microtime(true);
1916
1917                 // Now convert HTML to Markdown
1918                 $text = HTML::toMarkdown($text);
1919
1920                 // unmask the special chars back to HTML
1921                 $text = str_replace(['&\_lt\_;', '&\_gt\_;', '&\_amp\_;'], ['&lt;', '&gt;', '&amp;'], $text);
1922
1923                 $a->getProfiler()->saveTimestamp($stamp1, "parser", System::callstack());
1924
1925                 // Libertree has a problem with escaped hashtags.
1926                 $text = str_replace(['\#'], ['#'], $text);
1927
1928                 // Remove any leading or trailing whitespace, as this will mess up
1929                 // the Diaspora signature verification and cause the item to disappear
1930                 $text = trim($text);
1931
1932                 if ($for_diaspora) {
1933                         $url_search_string = "^\[\]";
1934                         $text = preg_replace_callback(
1935                                 "/([@!])\[(.*?)\]\(([$url_search_string]*?)\)/ism",
1936                                 ['self', 'bbCodeMention2DiasporaCallback'],
1937                                 $text
1938                         );
1939                 }
1940
1941                 Hook::callAll('bb2diaspora', $text);
1942
1943                 return $text;
1944         }
1945
1946         /**
1947      * @brief Pull out all #hashtags and @person tags from $string.
1948      *
1949      * We also get @person@domain.com - which would make
1950      * the regex quite complicated as tags can also
1951      * end a sentence. So we'll run through our results
1952      * and strip the period from any tags which end with one.
1953      * Returns array of tags found, or empty array.
1954      *
1955      * @param string $string Post content
1956      *
1957      * @return array List of tag and person names
1958      */
1959     public static function getTags($string)
1960     {
1961         $ret = [];
1962
1963         // Convert hashtag links to hashtags
1964         $string = preg_replace('/#\[url\=([^\[\]]*)\](.*?)\[\/url\]/ism', '#$2', $string);
1965
1966         // ignore anything in a code block
1967         $string = preg_replace('/\[code.*?\].*?\[\/code\]/sm', '', $string);
1968
1969         // Force line feeds at bbtags
1970         $string = str_replace(['[', ']'], ["\n[", "]\n"], $string);
1971
1972         // ignore anything in a bbtag
1973         $string = preg_replace('/\[(.*?)\]/sm', '', $string);
1974
1975         // Match full names against @tags including the space between first and last
1976         // We will look these up afterward to see if they are full names or not recognisable.
1977
1978         if (preg_match_all('/(@[^ \x0D\x0A,:?]+ [^ \x0D\x0A@,:?]+)([ \x0D\x0A@,:?]|$)/', $string, $matches)) {
1979             foreach ($matches[1] as $match) {
1980                 if (strstr($match, ']')) {
1981                     // we might be inside a bbcode color tag - leave it alone
1982                     continue;
1983                 }
1984
1985                 if (substr($match, -1, 1) === '.') {
1986                     $ret[] = substr($match, 0, -1);
1987                 } else {
1988                     $ret[] = $match;
1989                 }
1990             }
1991         }
1992
1993         // Otherwise pull out single word tags. These can be @nickname, @first_last
1994         // and #hash tags.
1995
1996         if (preg_match_all('/([!#@][^\^ \x0D\x0A,;:?]+)([ \x0D\x0A,;:?]|$)/', $string, $matches)) {
1997             foreach ($matches[1] as $match) {
1998                 if (strstr($match, ']')) {
1999                     // we might be inside a bbcode color tag - leave it alone
2000                     continue;
2001                 }
2002                 if (substr($match, -1, 1) === '.') {
2003                     $match = substr($match,0,-1);
2004                 }
2005                 // ignore strictly numeric tags like #1
2006                 if ((strpos($match, '#') === 0) && ctype_digit(substr($match, 1))) {
2007                     continue;
2008                 }
2009                 // try not to catch url fragments
2010                 if (strpos($string, $match) && preg_match('/[a-zA-z0-9\/]/', substr($string, strpos($string, $match) - 1, 1))) {
2011                     continue;
2012                 }
2013                 $ret[] = $match;
2014             }
2015         }
2016
2017         return $ret;
2018     }
2019 }