<?php
-
/**
- * @file src/Util/Strings.php
+ * @copyright Copyright (C) 2010-2022, the Friendica project
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
*/
namespace Friendica\Util;
/**
* Generates a pseudo-random string of hexadecimal characters
*
- * @param int $size
- * @return string
+ * @param int $size Size of string (default: 64)
+ *
+ * @return string Pseudo-random string
* @throws \Exception
*/
- public static function getRandomHex($size = 64)
+ public static function getRandomHex(int $size = 64): string
{
$byte_size = ceil($size / 2);
* Checks, if the given string is a valid hexadecimal code
*
* @param string $hexCode
- *
* @return bool
*/
- public static function isHex($hexCode)
+ public static function isHex(string $hexCode): bool
{
return !empty($hexCode) ? @preg_match("/^[a-f0-9]{2,}$/i", $hexCode) && !(strlen($hexCode) & 1) : false;
}
- /**
- * This is our primary input filter.
- *
- * Use this on any text input where angle chars are not valid or permitted
- * They will be replaced with safer brackets. This may be filtered further
- * if these are not allowed either.
- *
- * @param string $string Input string
- * @return string Filtered string
- */
- public static function escapeTags($string)
- {
- return str_replace(["<", ">"], ['[', ']'], $string);
- }
-
/**
* Use this on "body" or "content" input where angle chars shouldn't be removed,
* and allow them to be safely displayed.
* Generate a string that's random, but usually pronounceable. Used to generate initial passwords
*
* @param int $len length
- *
* @return string
*/
- public static function getRandomName($len)
+ public static function getRandomName(int $len): string
{
if ($len <= 0) {
return '';
* @return string Formatted network name
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
*/
- public static function formatNetworkName($network, $url = '')
+ public static function formatNetworkName(string $network, string $url = ''): string
{
if ($network != '') {
if ($url != '') {
return $network_name;
}
+
+ return '';
}
/**
*
* @return string Transformed string.
*/
- public static function deindent($text, $chr = "[\t ]", $count = NULL)
+ public static function deindent(string $text, string $chr = "[\t ]", int $count = null): string
{
$lines = explode("\n", $text);
*
* @return string Size with measured units.
*/
- public static function formatBytes($bytes, $precision = 2)
+ public static function formatBytes(int $bytes, int $precision = 2): string
{
$units = ['B', 'KB', 'MB', 'GB', 'TB'];
$bytes = max($bytes, 0);
* Protect percent characters in sprintf calls
*
* @param string $s String to transform.
- *
* @return string Transformed string.
*/
- public static function protectSprintf($s)
+ public static function protectSprintf(string $s): string
{
return str_replace('%', '%%', $s);
}
*
* @param string $s URL to encode
* @param boolean $strip_padding Optional. Default false
- *
* @return string Encoded URL
*/
- public static function base64UrlEncode($s, $strip_padding = false)
+ public static function base64UrlEncode(string $s, bool $strip_padding = false): string
{
$s = strtr(base64_encode($s), '+/', '-_');
/**
* Decode Base64 Encoded URL and translate -_ to +/
- * @param string $s URL to decode
*
+ * @param string $s URL to decode
* @return string Decoded URL
* @throws \Exception
*/
- public static function base64UrlDecode($s)
+ public static function base64UrlDecode(string $s): string
{
- if (is_array($s)) {
- Logger::log('base64url_decode: illegal input: ' . print_r(debug_backtrace(), true));
- return $s;
- }
-
/*
* // Placeholder for new rev of salmon which strips base64 padding.
* // PHP base64_decode handles the un-padded input without requiring this step
* Normalize url
*
* @param string $url URL to be normalized.
- *
* @return string Normalized URL.
*/
- public static function normaliseLink($url)
+ public static function normaliseLink(string $url): string
{
$ret = str_replace(['https:', '//www.'], ['http:', '//'], $url);
return rtrim($ret, '/');
* Normalize OpenID identity
*
* @param string $s OpenID Identity
- *
* @return string normalized OpenId Identity
*/
- public static function normaliseOpenID($s)
+ public static function normaliseOpenID(string $s): string
{
return trim(str_replace(['http://', 'https://'], ['', ''], $s), '/');
}
* @return boolean True if the URLs match, otherwise False
*
*/
- public static function compareLink($a, $b)
+ public static function compareLink(string $a, string $b): bool
{
return (strcasecmp(self::normaliseLink($a), self::normaliseLink($b)) === 0);
}
* @param string $uri
* @return string
*/
- public static function ensureQueryParameter($uri)
+ public static function ensureQueryParameter(string $uri): string
{
if (strpos($uri, '?') === false && ($pos = strpos($uri, '&')) !== false) {
$uri = substr($uri, 0, $pos) . '?' . substr($uri, $pos + 1);
* Check if the trimmed provided string is starting with one of the provided characters
*
* @param string $string
- * @param array $chars
+ * @param array $chars
+ *
* @return bool
*/
- public static function startsWith($string, array $chars)
+ public static function startsWithChars(string $string, array $chars): bool
{
$return = in_array(substr(trim($string), 0, 1), $chars);
return $return;
}
+ /**
+ * Check if the first string starts with the second
+ *
+ * @see http://maettig.com/code/php/php-performance-benchmarks.php#startswith
+ * @param string $string
+ * @param string $start
+ * @return bool
+ */
+ public static function startsWith(string $string, string $start): bool
+ {
+ $return = substr_compare($string, $start, 0, strlen($start)) === 0;
+
+ return $return;
+ }
+
+ /**
+ * Checks if the first string ends with the second
+ *
+ * @see http://maettig.com/code/php/php-performance-benchmarks.php#endswith
+ * @param string $string
+ * @param string $end
+ *
+ * @return bool
+ */
+ public static function endsWith(string $string, string $end): bool
+ {
+ return (substr_compare($string, $end, -strlen($end)) === 0);
+ }
+
/**
* Returns the regular expression string to match URLs in a given text
*
* @return string
* @see https://daringfireball.net/2010/07/improved_regex_for_matching_urls
*/
- public static function autoLinkRegEx()
+ public static function autoLinkRegEx(): string
{
return '@
(?<![=\'\]"/]) # Not preceded by [, =, \', ], ", /
/**
* Ensures a single path item doesn't contain any path-traversing characters
*
- * @see https://stackoverflow.com/a/46097713
* @param string $pathItem
+ *
+ * @see https://stackoverflow.com/a/46097713
* @return string
*/
- public static function sanitizeFilePathItem($pathItem)
+ public static function sanitizeFilePathItem(string $pathItem): string
{
$pathItem = str_replace('/', '_', $pathItem);
$pathItem = str_replace('\\', '_', $pathItem);
return $pathItem;
}
+
+ /**
+ * Multi-byte safe implementation of substr_replace where $start and $length are character offset and count rather
+ * than byte offset and counts.
+ *
+ * Depends on mbstring, use default encoding.
+ *
+ * @param string $string
+ * @param string $replacement
+ * @param int $start
+ * @param int|null $length
+ *
+ * @return string
+ * @see substr_replace()
+ */
+ public static function substringReplace(string $string, string $replacement, int $start, int $length = null): string
+ {
+ $string_length = mb_strlen($string);
+
+ $length = $length ?? $string_length;
+
+ if ($start < 0) {
+ $start = max(0, $string_length + $start);
+ } else if ($start > $string_length) {
+ $start = $string_length;
+ }
+
+ if ($length < 0) {
+ $length = max(0, $string_length - $start + $length);
+ } else if ($length > $string_length) {
+ $length = $string_length;
+ }
+
+ if (($start + $length) > $string_length) {
+ $length = $string_length - $start;
+ }
+
+ return mb_substr($string, 0, $start) . $replacement . mb_substr($string, $start + $length, $string_length - $start - $length);
+ }
+
+ /**
+ * Perform a custom function on a text after having escaped blocks matched by the provided regular expressions.
+ * Only full matches are used, capturing group are ignored.
+ *
+ * To change the provided text, the callback function needs to return it and this function will return the modified
+ * version as well after having restored the escaped blocks.
+ *
+ * @param string $text
+ * @param string $regex
+ * @param callable $callback
+ *
+ * @return string
+ */
+ public static function performWithEscapedBlocks(string $text, string $regex, callable $callback): string
+ {
+ // Enables nested use
+ $executionId = random_int(PHP_INT_MAX / 10, PHP_INT_MAX);
+
+ $blocks = [];
+
+ $text = preg_replace_callback($regex,
+ function ($matches) use ($executionId, &$blocks) {
+ $return = '«block-' . $executionId . '-' . count($blocks) . '»';
+
+ $blocks[] = $matches[0];
+
+ return $return;
+ },
+ $text
+ );
+
+ $text = $callback($text) ?? '';
+
+ // Restore code blocks
+ $text = preg_replace_callback('/«block-' . $executionId . '-([0-9]+)»/iU',
+ function ($matches) use ($blocks) {
+ $return = $matches[0];
+ if (isset($blocks[intval($matches[1])])) {
+ $return = $blocks[$matches[1]];
+ }
+ return $return;
+ },
+ $text
+ );
+
+ return $text;
+ }
}
projects / friendica.git / blobdiff