389 lines
19 KiB
PHP
389 lines
19 KiB
PHP
<?php
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/////////////////////////////////////////////////////////////////
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/// getID3() by James Heinrich <getid3@users.sourceforge.net> //
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// available at http://getid3.sourceforge.net ///
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/////////////////////////////////////////////////////////////////
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// //
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// getid3.zip.php - part of getID3() //
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// See getid3.readme.txt for more details //
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// //
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/////////////////////////////////////////////////////////////////
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function getZIPHeaderFilepointer(&$fd, &$ThisFileInfo) {
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$ThisFileInfo['fileformat'] = 'zip';
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$ThisFileInfo['zip']['files'] = array();
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$ThisFileInfo['zip']['compressed_size'] = 0;
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$ThisFileInfo['zip']['uncompressed_size'] = 0;
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$ThisFileInfo['zip']['entries_count'] = 0;
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$EOCDsearchData = '';
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$EOCDsearchCounter = 0;
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while ($EOCDsearchCounter++ < 512) {
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fseek($fd, -128 * $EOCDsearchCounter, SEEK_END);
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$EOCDsearchData = fread($fd, 128).$EOCDsearchData;
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if (strstr($EOCDsearchData, 'PK'.chr(5).chr(6))) {
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$EOCDposition = strpos($EOCDsearchData, 'PK'.chr(5).chr(6));
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fseek($fd, (-128 * $EOCDsearchCounter) + $EOCDposition, SEEK_END);
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$ThisFileInfo['zip']['end_central_directory'] = ZIPparseEndOfCentralDirectory($fd);
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fseek($fd, $ThisFileInfo['zip']['end_central_directory']['directory_offset'], SEEK_SET);
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$ThisFileInfo['zip']['entries_count'] = 0;
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while ($centraldirectoryentry = ZIPparseCentralDirectory($fd)) {
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$ThisFileInfo['zip']['central_directory'][] = $centraldirectoryentry;
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$ThisFileInfo['zip']['entries_count']++;
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$ThisFileInfo['zip']['compressed_size'] += $centraldirectoryentry['compressed_size'];
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$ThisFileInfo['zip']['uncompressed_size'] += $centraldirectoryentry['uncompressed_size'];
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if ($centraldirectoryentry['uncompressed_size'] > 0) {
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$ThisFileInfo['zip']['files'] = array_merge_clobber($ThisFileInfo['zip']['files'], CreateDeepArray($centraldirectoryentry['filename'], '/', $centraldirectoryentry['uncompressed_size']));
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}
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}
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if ($ThisFileInfo['zip']['entries_count'] == 0) {
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$ThisFileInfo['error'] .= "\n".'No Central Directory entries found (truncated file?)';
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return false;
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}
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if (isset($ThisFileInfo['zip']['end_central_directory']['comment'])) {
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$ThisFileInfo['zip']['comments']['comment'] = $ThisFileInfo['zip']['end_central_directory']['comment'];
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// ZIP tags have highest priority
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if (!empty($ThisFileInfo['zip']['comments'])) {
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CopyFormatCommentsToRootComments($ThisFileInfo['zip']['comments'], $ThisFileInfo, true, true, true);
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}
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// add tag to array of tags
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$ThisFileInfo['tags'][] = 'zip';
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}
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if (isset($ThisFileInfo['zip']['central_directory'][0]['compression_method'])) {
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$ThisFileInfo['zip']['compression_method'] = $ThisFileInfo['zip']['central_directory'][0]['compression_method'];
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}
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if (isset($ThisFileInfo['zip']['central_directory'][0]['flags']['compression_speed'])) {
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$ThisFileInfo['zip']['compression_speed'] = $ThisFileInfo['zip']['central_directory'][0]['flags']['compression_speed'];
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}
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if (isset($ThisFileInfo['zip']['compression_method']) && ($ThisFileInfo['zip']['compression_method'] == 'store') && !isset($ThisFileInfo['zip']['compression_speed'])) {
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$ThisFileInfo['zip']['compression_speed'] = 'store';
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}
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return true;
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}
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}
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if (getZIPentriesFilepointer($fd, $ThisFileInfo)) {
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// central directory couldn't be found and/or parsed
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// scan through actual file data entries, recover as much as possible from probable trucated file
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if ($ThisFileInfo['zip']['compressed_size'] > ($ThisFileInfo['filesize'] - 46 - 22)) {
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$ThisFileInfo['error'] .= "\n".'Warning: Truncated file! - Total compressed file sizes ('.$ThisFileInfo['zip']['compressed_size'].' bytes) is greater than filesize minus Central Directory and End Of Central Directory structures ('.($ThisFileInfo['filesize'] - 46 - 22).' bytes)';
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}
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$ThisFileInfo['error'] .= "\n".'Cannot find End Of Central Directory - returned list of files in [zip][entries] array may not be complete';
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return true;
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} else {
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unset($ThisFileInfo['zip']);
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$ThisFileInfo['fileformat'] = '';
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$ThisFileInfo['error'] .= "\n".'Cannot find End Of Central Directory (truncated file?)';
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return false;
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}
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}
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function getZIPHeaderFilepointerTopDown(&$fd, &$ThisFileInfo) {
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$ThisFileInfo['fileformat'] = 'zip';
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$ThisFileInfo['zip']['compressed_size'] = 0;
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$ThisFileInfo['zip']['uncompressed_size'] = 0;
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$ThisFileInfo['zip']['entries_count'] = 0;
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rewind($fd);
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while ($fileentry = ZIPparseLocalFileHeader($fd)) {
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$ThisFileInfo['zip']['entries'][] = $fileentry;
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$ThisFileInfo['zip']['entries_count']++;
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}
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if ($ThisFileInfo['zip']['entries_count'] == 0) {
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$ThisFileInfo['error'] .= "\n".'No Local File Header entries found';
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return false;
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}
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$ThisFileInfo['zip']['entries_count'] = 0;
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while ($centraldirectoryentry = ZIPparseCentralDirectory($fd)) {
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$ThisFileInfo['zip']['central_directory'][] = $centraldirectoryentry;
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$ThisFileInfo['zip']['entries_count']++;
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$ThisFileInfo['zip']['compressed_size'] += $centraldirectoryentry['compressed_size'];
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$ThisFileInfo['zip']['uncompressed_size'] += $centraldirectoryentry['uncompressed_size'];
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}
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if ($ThisFileInfo['zip']['entries_count'] == 0) {
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$ThisFileInfo['error'] .= "\n".'No Central Directory entries found (truncated file?)';
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return false;
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}
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if ($EOCD = ZIPparseEndOfCentralDirectory($fd)) {
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$ThisFileInfo['zip']['end_central_directory'] = $EOCD;
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} else {
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$ThisFileInfo['error'] .= "\n".'No End Of Central Directory entry found (truncated file?)';
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return false;
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}
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if (isset($ThisFileInfo['zip']['end_central_directory']['comment'])) {
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$ThisFileInfo['zip']['comments']['comment'] = $ThisFileInfo['zip']['end_central_directory']['comment'];
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// ZIP tags have highest priority
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if (!empty($ThisFileInfo['zip']['comments'])) {
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CopyFormatCommentsToRootComments($ThisFileInfo['zip']['comments'], $ThisFileInfo, true, true, true);
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}
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// add tag to array of tags
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$ThisFileInfo['tags'][] = 'zip';
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}
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return true;
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}
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function getZIPentriesFilepointer(&$fd, &$ThisFileInfo) {
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$ThisFileInfo['zip']['compressed_size'] = 0;
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$ThisFileInfo['zip']['uncompressed_size'] = 0;
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$ThisFileInfo['zip']['entries_count'] = 0;
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rewind($fd);
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while ($fileentry = ZIPparseLocalFileHeader($fd)) {
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$ThisFileInfo['zip']['entries'][] = $fileentry;
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$ThisFileInfo['zip']['entries_count']++;
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$ThisFileInfo['zip']['compressed_size'] += $fileentry['compressed_size'];
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$ThisFileInfo['zip']['uncompressed_size'] += $fileentry['uncompressed_size'];
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}
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if ($ThisFileInfo['zip']['entries_count'] == 0) {
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$ThisFileInfo['error'] .= "\n".'No Local File Header entries found';
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return false;
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}
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return true;
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}
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function ZIPparseLocalFileHeader(&$fd) {
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$LocalFileHeader['offset'] = ftell($fd);
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$ZIPlocalFileHeader = fread($fd, 30);
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$LocalFileHeader['raw']['signature'] = LittleEndian2Int(substr($ZIPlocalFileHeader, 0, 4));
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if ($LocalFileHeader['raw']['signature'] != 0x04034B50) {
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// invalid Local File Header Signature
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fseek($fd, $LocalFileHeader['offset'], SEEK_SET); // seek back to where filepointer originally was so it can be handled properly
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return false;
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}
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$LocalFileHeader['raw']['extract_version'] = LittleEndian2Int(substr($ZIPlocalFileHeader, 4, 2));
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$LocalFileHeader['raw']['general_flags'] = LittleEndian2Int(substr($ZIPlocalFileHeader, 6, 2));
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$LocalFileHeader['raw']['compression_method'] = LittleEndian2Int(substr($ZIPlocalFileHeader, 8, 2));
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$LocalFileHeader['raw']['last_mod_file_time'] = LittleEndian2Int(substr($ZIPlocalFileHeader, 10, 2));
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$LocalFileHeader['raw']['last_mod_file_date'] = LittleEndian2Int(substr($ZIPlocalFileHeader, 12, 2));
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$LocalFileHeader['raw']['crc_32'] = LittleEndian2Int(substr($ZIPlocalFileHeader, 14, 4));
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$LocalFileHeader['raw']['compressed_size'] = LittleEndian2Int(substr($ZIPlocalFileHeader, 18, 4));
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$LocalFileHeader['raw']['uncompressed_size'] = LittleEndian2Int(substr($ZIPlocalFileHeader, 22, 4));
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$LocalFileHeader['raw']['filename_length'] = LittleEndian2Int(substr($ZIPlocalFileHeader, 26, 2));
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$LocalFileHeader['raw']['extra_field_length'] = LittleEndian2Int(substr($ZIPlocalFileHeader, 28, 2));
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$LocalFileHeader['extract_version'] = sprintf('%1.1f', $LocalFileHeader['raw']['extract_version'] / 10);
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$LocalFileHeader['host_os'] = ZIPversionOSLookup(($LocalFileHeader['raw']['extract_version'] & 0xFF00) >> 8);
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$LocalFileHeader['compression_method'] = ZIPcompressionMethodLookup($LocalFileHeader['raw']['compression_method']);
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$LocalFileHeader['compressed_size'] = $LocalFileHeader['raw']['compressed_size'];
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$LocalFileHeader['uncompressed_size'] = $LocalFileHeader['raw']['uncompressed_size'];
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$LocalFileHeader['flags'] = ZIPparseGeneralPurposeFlags($LocalFileHeader['raw']['general_flags'], $LocalFileHeader['raw']['compression_method']);
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$LocalFileHeader['last_modified_timestamp'] = DOStime2UNIXtime($LocalFileHeader['raw']['last_mod_file_date'], $LocalFileHeader['raw']['last_mod_file_time']);
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$FilenameExtrafieldLength = $LocalFileHeader['raw']['filename_length'] + $LocalFileHeader['raw']['extra_field_length'];
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if ($FilenameExtrafieldLength > 0) {
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$ZIPlocalFileHeader .= fread($fd, $FilenameExtrafieldLength);
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if ($LocalFileHeader['raw']['filename_length'] > 0) {
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$LocalFileHeader['filename'] = substr($ZIPlocalFileHeader, 30, $LocalFileHeader['raw']['filename_length']);
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}
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if ($LocalFileHeader['raw']['extra_field_length'] > 0) {
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$LocalFileHeader['raw']['extra_field_data'] = substr($ZIPlocalFileHeader, 30 + $LocalFileHeader['raw']['filename_length'], $LocalFileHeader['raw']['extra_field_length']);
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}
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}
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//$LocalFileHeader['compressed_data'] = fread($fd, $LocalFileHeader['raw']['compressed_size']);
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fseek($fd, $LocalFileHeader['raw']['compressed_size'], SEEK_CUR);
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if ($LocalFileHeader['flags']['data_descriptor_used']) {
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$DataDescriptor = fread($fd, 12);
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$LocalFileHeader['data_descriptor']['crc_32'] = LittleEndian2Int(substr($DataDescriptor, 0, 4));
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$LocalFileHeader['data_descriptor']['compressed_size'] = LittleEndian2Int(substr($DataDescriptor, 4, 4));
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$LocalFileHeader['data_descriptor']['uncompressed_size'] = LittleEndian2Int(substr($DataDescriptor, 8, 4));
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}
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return $LocalFileHeader;
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}
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function ZIPparseCentralDirectory(&$fd) {
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$CentralDirectory['offset'] = ftell($fd);
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$ZIPcentralDirectory = fread($fd, 46);
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$CentralDirectory['raw']['signature'] = LittleEndian2Int(substr($ZIPcentralDirectory, 0, 4));
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if ($CentralDirectory['raw']['signature'] != 0x02014B50) {
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// invalid Central Directory Signature
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fseek($fd, $CentralDirectory['offset'], SEEK_SET); // seek back to where filepointer originally was so it can be handled properly
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return false;
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}
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$CentralDirectory['raw']['create_version'] = LittleEndian2Int(substr($ZIPcentralDirectory, 4, 2));
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$CentralDirectory['raw']['extract_version'] = LittleEndian2Int(substr($ZIPcentralDirectory, 6, 2));
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$CentralDirectory['raw']['general_flags'] = LittleEndian2Int(substr($ZIPcentralDirectory, 8, 2));
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$CentralDirectory['raw']['compression_method'] = LittleEndian2Int(substr($ZIPcentralDirectory, 10, 2));
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$CentralDirectory['raw']['last_mod_file_time'] = LittleEndian2Int(substr($ZIPcentralDirectory, 12, 2));
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$CentralDirectory['raw']['last_mod_file_date'] = LittleEndian2Int(substr($ZIPcentralDirectory, 14, 2));
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$CentralDirectory['raw']['crc_32'] = LittleEndian2Int(substr($ZIPcentralDirectory, 16, 4));
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$CentralDirectory['raw']['compressed_size'] = LittleEndian2Int(substr($ZIPcentralDirectory, 20, 4));
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$CentralDirectory['raw']['uncompressed_size'] = LittleEndian2Int(substr($ZIPcentralDirectory, 24, 4));
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$CentralDirectory['raw']['filename_length'] = LittleEndian2Int(substr($ZIPcentralDirectory, 28, 2));
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$CentralDirectory['raw']['extra_field_length'] = LittleEndian2Int(substr($ZIPcentralDirectory, 30, 2));
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$CentralDirectory['raw']['file_comment_length'] = LittleEndian2Int(substr($ZIPcentralDirectory, 32, 2));
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$CentralDirectory['raw']['disk_number_start'] = LittleEndian2Int(substr($ZIPcentralDirectory, 34, 2));
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$CentralDirectory['raw']['internal_file_attrib'] = LittleEndian2Int(substr($ZIPcentralDirectory, 36, 2));
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$CentralDirectory['raw']['external_file_attrib'] = LittleEndian2Int(substr($ZIPcentralDirectory, 38, 4));
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$CentralDirectory['raw']['local_header_offset'] = LittleEndian2Int(substr($ZIPcentralDirectory, 42, 4));
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$CentralDirectory['entry_offset'] = $CentralDirectory['raw']['local_header_offset'];
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$CentralDirectory['create_version'] = sprintf('%1.1f', $CentralDirectory['raw']['create_version'] / 10);
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$CentralDirectory['extract_version'] = sprintf('%1.1f', $CentralDirectory['raw']['extract_version'] / 10);
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$CentralDirectory['host_os'] = ZIPversionOSLookup(($CentralDirectory['raw']['extract_version'] & 0xFF00) >> 8);
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$CentralDirectory['compression_method'] = ZIPcompressionMethodLookup($CentralDirectory['raw']['compression_method']);
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$CentralDirectory['compressed_size'] = $CentralDirectory['raw']['compressed_size'];
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$CentralDirectory['uncompressed_size'] = $CentralDirectory['raw']['uncompressed_size'];
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$CentralDirectory['flags'] = ZIPparseGeneralPurposeFlags($CentralDirectory['raw']['general_flags'], $CentralDirectory['raw']['compression_method']);
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$CentralDirectory['last_modified_timestamp'] = DOStime2UNIXtime($CentralDirectory['raw']['last_mod_file_date'], $CentralDirectory['raw']['last_mod_file_time']);
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$FilenameExtrafieldCommentLength = $CentralDirectory['raw']['filename_length'] + $CentralDirectory['raw']['extra_field_length'] + $CentralDirectory['raw']['file_comment_length'];
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if ($FilenameExtrafieldCommentLength > 0) {
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$FilenameExtrafieldComment = fread($fd, $FilenameExtrafieldCommentLength);
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if ($CentralDirectory['raw']['filename_length'] > 0) {
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$CentralDirectory['filename'] = substr($FilenameExtrafieldComment, 0, $CentralDirectory['raw']['filename_length']);
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}
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if ($CentralDirectory['raw']['extra_field_length'] > 0) {
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$CentralDirectory['raw']['extra_field_data'] = substr($FilenameExtrafieldComment, $CentralDirectory['raw']['filename_length'], $CentralDirectory['raw']['extra_field_length']);
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}
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if ($CentralDirectory['raw']['file_comment_length'] > 0) {
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$CentralDirectory['file_comment'] = substr($FilenameExtrafieldComment, $CentralDirectory['raw']['filename_length'] + $CentralDirectory['raw']['extra_field_length'], $CentralDirectory['raw']['file_comment_length']);
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}
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}
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return $CentralDirectory;
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}
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function ZIPparseEndOfCentralDirectory(&$fd) {
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$EndOfCentralDirectory['offset'] = ftell($fd);
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$ZIPendOfCentralDirectory = fread($fd, 22);
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$EndOfCentralDirectory['signature'] = LittleEndian2Int(substr($ZIPendOfCentralDirectory, 0, 4));
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if ($EndOfCentralDirectory['signature'] != 0x06054B50) {
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// invalid End Of Central Directory Signature
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fseek($fd, $EndOfCentralDirectory['offset'], SEEK_SET); // seek back to where filepointer originally was so it can be handled properly
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return false;
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}
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$EndOfCentralDirectory['disk_number_current'] = LittleEndian2Int(substr($ZIPendOfCentralDirectory, 4, 2));
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$EndOfCentralDirectory['disk_number_start_directory'] = LittleEndian2Int(substr($ZIPendOfCentralDirectory, 6, 2));
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$EndOfCentralDirectory['directory_entries_this_disk'] = LittleEndian2Int(substr($ZIPendOfCentralDirectory, 8, 2));
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$EndOfCentralDirectory['directory_entries_total'] = LittleEndian2Int(substr($ZIPendOfCentralDirectory, 10, 2));
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$EndOfCentralDirectory['directory_size'] = LittleEndian2Int(substr($ZIPendOfCentralDirectory, 12, 4));
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$EndOfCentralDirectory['directory_offset'] = LittleEndian2Int(substr($ZIPendOfCentralDirectory, 16, 4));
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$EndOfCentralDirectory['comment_length'] = LittleEndian2Int(substr($ZIPendOfCentralDirectory, 20, 2));
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if ($EndOfCentralDirectory['comment_length'] > 0) {
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$EndOfCentralDirectory['comment'] = fread($fd, $EndOfCentralDirectory['comment_length']);
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}
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return $EndOfCentralDirectory;
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}
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function ZIPparseGeneralPurposeFlags($flagbytes, $compressionmethod) {
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$ParsedFlags['encrypted'] = (bool) ($flagbytes & 0x0001);
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switch ($compressionmethod) {
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case 6:
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$ParsedFlags['dictionary_size'] = (($flagbytes & 0x0002) ? 8192 : 4096);
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$ParsedFlags['shannon_fano_trees'] = (($flagbytes & 0x0004) ? 3 : 2);
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break;
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case 8:
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case 9:
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switch (($flagbytes & 0x0006) >> 1) {
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case 0:
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$ParsedFlags['compression_speed'] = 'normal';
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break;
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case 1:
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$ParsedFlags['compression_speed'] = 'maximum';
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break;
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case 2:
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$ParsedFlags['compression_speed'] = 'fast';
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break;
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case 3:
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$ParsedFlags['compression_speed'] = 'superfast';
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break;
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}
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break;
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}
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$ParsedFlags['data_descriptor_used'] = (bool) ($flagbytes & 0x0008);
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return $ParsedFlags;
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}
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function ZIPversionOSLookup($index) {
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static $ZIPversionOSLookup = array();
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if (empty($ZIPversionOSLookup)) {
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$ZIPversionOSLookup[0] = 'MS-DOS and OS/2 (FAT / VFAT / FAT32 file systems)';
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$ZIPversionOSLookup[1] = 'Amiga';
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$ZIPversionOSLookup[2] = 'OpenVMS';
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$ZIPversionOSLookup[3] = 'Unix';
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$ZIPversionOSLookup[4] = 'VM/CMS';
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$ZIPversionOSLookup[5] = 'Atari ST';
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$ZIPversionOSLookup[6] = 'OS/2 H.P.F.S.';
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$ZIPversionOSLookup[7] = 'Macintosh';
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$ZIPversionOSLookup[8] = 'Z-System';
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$ZIPversionOSLookup[9] = 'CP/M';
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$ZIPversionOSLookup[10] = 'Windows NTFS';
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$ZIPversionOSLookup[11] = 'MVS';
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$ZIPversionOSLookup[12] = 'VSE';
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$ZIPversionOSLookup[13] = 'Acorn Risc';
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$ZIPversionOSLookup[14] = 'VFAT';
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$ZIPversionOSLookup[15] = 'Alternate MVS';
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$ZIPversionOSLookup[16] = 'BeOS';
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$ZIPversionOSLookup[17] = 'Tandem';
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}
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return (isset($ZIPversionOSLookup[$index]) ? $ZIPversionOSLookup[$index] : '[unknown]');
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}
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function ZIPcompressionMethodLookup($index) {
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static $ZIPcompressionMethodLookup = array();
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if (empty($ZIPcompressionMethodLookup)) {
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$ZIPcompressionMethodLookup[0] = 'store';
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$ZIPcompressionMethodLookup[1] = 'shrink';
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$ZIPcompressionMethodLookup[2] = 'reduce-1';
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$ZIPcompressionMethodLookup[3] = 'reduce-2';
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$ZIPcompressionMethodLookup[4] = 'reduce-3';
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$ZIPcompressionMethodLookup[5] = 'reduce-4';
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$ZIPcompressionMethodLookup[6] = 'implode';
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$ZIPcompressionMethodLookup[7] = 'tokenize';
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$ZIPcompressionMethodLookup[8] = 'deflate';
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$ZIPcompressionMethodLookup[9] = 'deflate64';
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$ZIPcompressionMethodLookup[10] = 'PKWARE Date Compression Library Imploding';
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}
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return (isset($ZIPcompressionMethodLookup[$index]) ? $ZIPcompressionMethodLookup[$index] : '[unknown]');
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}
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?>
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