vendor/james-heinrich/getid3/demos/demo.zip.php

   1 <?php
   2 /////////////////////////////////////////////////////////////////
   3 /// getID3() by James Heinrich <info@getid3.org>               //
   4 //  available at http://getid3.sourceforge.net                 //
   5 //            or http://www.getid3.org                         //
   6 //          also https://github.com/JamesHeinrich/getID3       //
   7 /////////////////////////////////////////////////////////////////
   8 //                                                             //
   9 // /demo/demo.zip.php - part of getID3()                       //
  10 // Sample script how to use getID3() to decompress zip files   //
  11 // See readme.txt for more details                             //
  12 //                                                            ///
  13 /////////////////////////////////////////////////////////////////
  14
  15
  16 function UnzipFileContents($filename, &$errors) {
  17         $errors = array();
  18         $DecompressedFileContents = array();
  19         if (!class_exists('getID3')) {
  20                 $errors[] = 'class getID3 not defined, please include getid3.php';
  21         } elseif (include_once('module.archive.zip.php')) {
  22                 $getid3 = new getID3();
  23                 $getid3->info['filesize'] = filesize($filename);
  24                 ob_start();
  25                 if ($getid3->fp = fopen($filename, 'rb')) {
  26                         ob_end_clean();
  27                         $getid3_zip = new getid3_zip($getid3);
  28                         $getid3_zip->analyze($filename);
  29                         if (($getid3->info['fileformat'] == 'zip') && !empty($getid3->info['zip']['files'])) {
  30                                 if (!empty($getid3->info['zip']['central_directory'])) {
  31                                         $ZipDirectoryToWalk = $getid3->info['zip']['central_directory'];
  32                                 } elseif (!empty($getid3->info['zip']['entries'])) {
  33                                         $ZipDirectoryToWalk = $getid3->info['zip']['entries'];
  34                                 } else {
  35                                         $errors[] = 'failed to parse ZIP attachment "'.$piece_filename.'" (no central directory)<br>';
  36                                         fclose($getid3->fp);
  37                                         return false;
  38                                 }
  39                                 foreach ($ZipDirectoryToWalk as $key => $valuearray) {
  40                                         fseek($getid3->fp, $valuearray['entry_offset'], SEEK_SET);
  41                                         $LocalFileHeader = $getid3_zip->ZIPparseLocalFileHeader($getid3->fp);
  42                                         if ($LocalFileHeader['flags']['encrypted']) {
  43                                                 // password-protected
  44                                                 $DecompressedFileContents[$valuearray['filename']] = '';
  45                                         } else {
  46                                                 fseek($getid3->fp, $LocalFileHeader['data_offset'], SEEK_SET);
  47                                                 $compressedFileData = '';
  48                                                 while ((strlen($compressedFileData) < $LocalFileHeader['compressed_size']) && !feof($getid3->fp)) {
  49                                                         $compressedFileData .= fread($getid3->fp, 32768);
  50                                                 }
  51                                                 switch ($LocalFileHeader['raw']['compression_method']) {
  52                                                         case 0: // store - great, just copy data unchanged
  53                                                                 $uncompressedFileData = $compressedFileData;
  54                                                                 break;
  55
  56                                                         case 8: // deflate
  57                                                                 ob_start();
  58                                                                 $uncompressedFileData = gzinflate($compressedFileData);
  59                                                                 $gzinflate_errors = trim(strip_tags(ob_get_contents()));
  60                                                                 ob_end_clean();
  61                                                                 if ($gzinflate_errors) {
  62                                                                         $errors[] = 'gzinflate() failed for file ['.$LocalFileHeader['filename'].']: "'.$gzinflate_errors.'"';
  63                                                                         continue 2;
  64                                                                 }
  65                                                                 break;
  66
  67                                                         case 1:  // shrink
  68                                                         case 2:  // reduce-1
  69                                                         case 3:  // reduce-2
  70                                                         case 4:  // reduce-3
  71                                                         case 5:  // reduce-4
  72                                                         case 6:  // implode
  73                                                         case 7:  // tokenize
  74                                                         case 9:  // deflate64
  75                                                         case 10: // PKWARE Date Compression Library Imploding
  76                                                                 $DecompressedFileContents[$valuearray['filename']] = '';
  77                                                                 $errors[] = 'unsupported ZIP compression method ('.$LocalFileHeader['raw']['compression_method'].' = '.$getid3_zip->ZIPcompressionMethodLookup($LocalFileHeader['raw']['compression_method']).')';
  78                                                                 continue 2;
  79
  80                                                         default:
  81                                                                 $DecompressedFileContents[$valuearray['filename']] = '';
  82                                                                 $errors[] = 'unknown ZIP compression method ('.$LocalFileHeader['raw']['compression_method'].')';
  83                                                                 continue 2;
  84                                                 }
  85                                                 $DecompressedFileContents[$valuearray['filename']] = $uncompressedFileData;
  86                                                 unset($compressedFileData);
  87                                         }
  88                                 }
  89                         } else {
  90                                 $errors[] = $filename.' does not appear to be a zip file';
  91                         }
  92                 } else {
  93                         $error_message = ob_get_contents();
  94                         ob_end_clean();
  95                         $errors[] = 'failed to fopen('.$filename.', rb): '.$error_message;
  96                 }
  97         } else {
  98                 $errors[] = 'failed to include_once(module.archive.zip.php)';
  99         }
 100         return $DecompressedFileContents;
 101 }