index.php

   1 <?php
   2         /*
   3                 This program is free software: you can redistribute it and/or modify
   4                 it under the terms of the GNU General Public License as published by
   5                 the Free Software Foundation, either version 3 of the License, or
   6                 (at your option) any later version.
   7
   8                 This program is distributed in the hope that it will be useful,
   9                 but WITHOUT ANY WARRANTY; without even the implied warranty of
  10                 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11                 GNU General Public License for more details.
  12
  13                 You should have received a copy of the GNU General Public License
  14                 along with this program.  If not, see <http://www.gnu.org/licenses/>.
  15         */
  16
  17         // ============== Configuration begin  ==============
  18
  19         $settings = array(
  20
  21                 // Directory to store uploaded files
  22                 uploaddir => '.',
  23
  24                 // Display list uploaded files
  25                 listfiles => true,
  26
  27                 // Allow users to delete files that they have uploaded (will enable sessions)
  28                 allow_deletion => true,
  29
  30                 // Display file sizes
  31                 listfiles_size => true,
  32
  33                 // Display file dates
  34                 listfiles_date => true,
  35
  36                 // Display file dates format
  37                 listfiles_date_format => 'F d Y H:i:s',
  38
  39                 // Randomize file names (number of 'false')
  40                 random_name_len => 8,
  41
  42                 // Keep filetype information (if random name is activated)
  43                 random_name_keep_type => true,
  44
  45                 // Random file name letters
  46                 random_name_alphabet => 'qazwsxedcrfvtgbyhnujmikolp1234567890',
  47
  48                 // Display debugging information
  49                 debug => false,
  50
  51                 // Complete URL to your directory (including tracing slash)
  52                 url => 'http://strace.club/',
  53
  54         );
  55
  56         // ============== Configuration end  ==============
  57
  58         $data = array();
  59
  60         // Name of this file
  61         $data['scriptname'] = pathinfo(__FILE__, PATHINFO_BASENAME);
  62
  63         // Use canonized path
  64         $data['uploaddir'] = realpath($settings['uploaddir']);
  65
  66         // Maximum upload size, set by system
  67         $data['max_upload_size'] = ini_get('upload_max_filesize');
  68
  69         if ($settings['allow_deletion']) {
  70                 session_start();
  71
  72                 if (!isset($_SESSION['upload_user_id']))
  73                         $_SESSION['upload_user_id'] = rand(1000, 9999);
  74
  75                 if (!isset($_SESSION['upload_user_files']))
  76                         $_SESSION['upload_user_files'] = array();
  77         }
  78
  79         if ($settings['debug']) {
  80
  81
  82                 // Enabling error reporting
  83                 error_reporting(E_ALL);
  84                 error_reporting(1);
  85
  86                 // Displaying debug information
  87                 echo '<h2>Debugging information: settings</h2>';
  88                 echo '<pre>';
  89                 print_r($settings);
  90                 echo '</pre>';
  91
  92                 // Displaying debug information
  93                 echo '<h2>Debugging information: data</h2>';
  94                 echo '<pre>';
  95                 print_r($data);
  96                 echo '</pre>';
  97                 echo '</pre>';
  98
  99                 // Displaying debug information
 100                 echo '<h2>Debugging information: _SESSION</h2>';
 101                 echo '<pre>';
 102                 print_r($_SESSION);
 103                 echo '</pre>';
 104         }
 105
 106         function FormatSize ($bytes) {
 107                 $units = array('B', 'KB', 'MB', 'GB', 'TB');
 108
 109                 $bytes = max($bytes, 0);
 110                 $pow = floor(($bytes ? log($bytes) : 0) / log(1024));
 111                 $pow = min($pow, count($units) - 1);
 112
 113                 $bytes /= pow(1024, $pow);
 114
 115                 return ceil($bytes) . ' ' . $units[$pow];
 116         }
 117
 118         function DiverseArray ($vector) {
 119                 $result = array();
 120                 foreach($vector as $key1 => $value1)
 121                         foreach($value1 as $key2 => $value2)
 122                                 $result[$key2][$key1] = $value2;
 123                 return $result;
 124         }
 125
 126         function UploadFile ($file_data) {
 127                 global $settings;
 128                 global $data;
 129                 global $_SESSION;
 130
 131                 $data['uploaded_file_name'] = basename($file_data['name']);
 132                 $data['target_file_name'] = $file_data['uploaded_file_name'];
 133                 if ($settings['random_name_len'] !== false) {
 134                         do {
 135                                 $data['target_file_name'] = '';
 136                                 while (strlen($data['target_file_name']) < $settings['random_name_len'])
 137                                         $data['target_file_name'] .= $settings['random_name_alphabet'][rand(0, strlen($settings['random_name_alphabet']) - 1)];
 138                                 if ($settings['random_name_keep_type'])
 139                                         $data['target_file_name'] .= '.' . pathinfo($data['uploaded_file_name'], PATHINFO_EXTENSION);
 140                         } while (file_exists($data['target_file_name']));
 141                 }
 142                 $data['upload_target_file'] = $data['uploaddir'] . DIRECTORY_SEPARATOR . $data['target_file_name'];
 143                 $data['tmp_name'] = $file_data['tmp_name'];
 144
 145                 if (file_exists($data['upload_target_file'])) {
 146                         echo 'File name already exists' . "\n";
 147                         return;
 148                 }
 149
 150                 if (move_uploaded_file($data['tmp_name'], $data['upload_target_file'])) {
 151                         if ($settings['allow_deletion'])
 152                                 $_SESSION['upload_user_files'][] = $data['target_file_name'];
 153                         echo $settings['url'] .  $data['target_file_name'] . "\n";
 154                 } else {
 155                         echo 'Error: unable to upload the file.';
 156                 }
 157         }
 158
 159         if (isset($_FILES['file'])) {
 160                 if ($settings['debug']) {
 161                         // Displaying debug information
 162                         echo '<h2>Debugging information: data</h2>';
 163                         echo '<pre>';
 164                         print_r($data);
 165                         echo '</pre>';
 166                         // Displaying debug information
 167                         echo '<h2>Debugging information: file</h2>';
 168                         echo '<pre>';
 169                         print_r($_FILES);
 170                         echo '</pre>';
 171                 }
 172
 173                 if (is_array($_FILES['file'])) {
 174                         $file_array = DiverseArray($_FILES['file']);
 175                         foreach ($file_array as $file_data)
 176                                 UploadFile($file_data);
 177                 } else
 178                         UploadFile($_FILES['file']);
 179                 exit;
 180         }
 181
 182         if ($settings['allow_deletion'])
 183                 if (isset($_POST))
 184                         if ($_POST['action'] === 'delete')
 185                                 if (in_array($_POST['target'], $_SESSION['upload_user_files']))
 186                                         if (file_exists($_POST['target'])) {
 187                                                 unlink($_POST['target']);
 188                                                 echo 'File has been removed';
 189                                                 exit;
 190                                         }
 191 ?>
 192 <html lang="en-GB">
 193         <head>
 194                 <meta charset="utf-8">
 195                 <title>Simple PHP Upload</title>
 196         </head>
 197         <body>
 198                 <h1>Simple PHP Upload</h1>
 199                 <p>
 200                         Maximum upload size: <?php echo $data['max_upload_size']; ?>
 201                 </p>
 202                 <form action="<?= $data['scriptname'] ?>" method="POST" enctype="multipart/form-data" class="dropzone" id="my-awesome-dropzone">
 203                         <div class="fallback">
 204                                 Choose File: <input type="file" name="file[]" multiple required /><br />
 205                                 <input type="submit" value="Upload" />
 206                         </div>
 207                 </form>
 208                 <?php if ($settings['listfiles']) { ?>
 209                         <strong>Uploaded files:</strong><br />
 210                         <ul>
 211                                 <?php
 212                                         $dh = opendir($settings['uploaddir']);
 213                                         while (false !== ($filename = readdir($dh)))
 214                                                 if (is_file($filename) && !in_array($filename, array('.', '..', $data['scriptname']))) {
 215                                                         $file_info = array();
 216
 217                                                         if ($settings['listfiles_size'])
 218                                                                 $file_info[] = FormatSize(filesize($filename));
 219
 220                                                         if ($settings['listfiles_size'])
 221                                                                 $file_info[] = date($settings['listfiles_date_format'], filemtime($filename));
 222
 223                                                         if ($settings['allow_deletion'])
 224                                                                 if (in_array($filename, $_SESSION['upload_user_files']))
 225                                                                         $file_info[] = '<form action="' . $data['scriptname'] . '" method="POST"><input type="hidden" name="target" value="' . $filename . '" /><input type="hidden" name="action" value="delete" /><button type="submit">delete</button></form>';
 226
 227                                                         $file_info = implode(', ', $file_info);
 228
 229                                                         if (strlen($file_info) > 0)
 230                                                                 $file_info = ' (' . $file_info . ')';
 231
 232                                                         echo "<li><a href=\"$filename\">$filename</a>$file_info</li>";
 233                                                 }
 234                                 ?>
 235                         </ul>
 236                 <?php } ?>
 237         </body>
 238 </html>