← Back
Editing: module.misc.iso.php
<?php ///////////////////////////////////////////////////////////////// /// getID3() by James Heinrich <info@getid3.org> // // available at https://github.com/JamesHeinrich/getID3 // // or https://www.getid3.org // // or http://getid3.sourceforge.net // // see readme.txt for more details // ///////////////////////////////////////////////////////////////// // // // module.misc.iso.php // // module for analyzing ISO files // // dependencies: NONE // // /// ///////////////////////////////////////////////////////////////// if (!defined('GETID3_INCLUDEPATH')) { // prevent path-exposing attacks that access modules directly on public webservers exit; } class getid3_iso extends getid3_handler { /** * @return bool */ public function Analyze() { $info = &$this->getid3->info; $info['fileformat'] = 'iso'; for ($i = 16; $i <= 19; $i++) { $this->fseek(2048 * $i); $ISOheader = $this->fread(2048); if (substr($ISOheader, 1, 5) == 'CD001') { switch (ord($ISOheader[0])) { case 1: $info['iso']['primary_volume_descriptor']['offset'] = 2048 * $i; $this->ParsePrimaryVolumeDescriptor($ISOheader); break; case 2: $info['iso']['supplementary_volume_descriptor']['offset'] = 2048 * $i; $this->ParseSupplementaryVolumeDescriptor($ISOheader); break; default: // skip break; } } } $this->ParsePathTable(); $info['iso']['files'] = array(); if (!empty($info['iso']['path_table']['directories'])) { foreach ($info['iso']['path_table']['directories'] as $directorynum => $directorydata) { $info['iso']['directories'][$directorynum] = $this->ParseDirectoryRecord($directorydata); } } return true; } /** * @param string $ISOheader * * @return bool */ public function ParsePrimaryVolumeDescriptor(&$ISOheader) { // ISO integer values are stored *BOTH* Little-Endian AND Big-Endian format!! // ie 12345 == 0x3039 is stored as $39 $30 $30 $39 in a 4-byte field // shortcuts $info = &$this->getid3->info; $info['iso']['primary_volume_descriptor']['raw'] = array(); $thisfile_iso_primaryVD = &$info['iso']['primary_volume_descriptor']; $thisfile_iso_primaryVD_raw = &$thisfile_iso_primaryVD['raw']; $thisfile_iso_primaryVD_raw['volume_descriptor_type'] = getid3_lib::LittleEndian2Int(substr($ISOheader, 0, 1)); $thisfile_iso_primaryVD_raw['standard_identifier'] = substr($ISOheader, 1, 5); if ($thisfile_iso_primaryVD_raw['standard_identifier'] != 'CD001') { $this->error('Expected "CD001" at offset ('.($thisfile_iso_primaryVD['offset'] + 1).'), found "'.$thisfile_iso_primaryVD_raw['standard_identifier'].'" instead'); unset($info['fileformat']); unset($info['iso']); return false; } $thisfile_iso_primaryVD_raw['volume_descriptor_version'] = getid3_lib::LittleEndian2Int(substr($ISOheader, 6, 1)); //$thisfile_iso_primaryVD_raw['unused_1'] = substr($ISOheader, 7, 1); $thisfile_iso_primaryVD_raw['system_identifier'] = substr($ISOheader, 8, 32); $thisfile_iso_primaryVD_raw['volume_identifier'] = substr($ISOheader, 40, 32); //$thisfile_iso_primaryVD_raw['unused_2'] = substr($ISOheader, 72, 8); $thisfile_iso_primaryVD_raw['volume_space_size'] = getid3_lib::LittleEndian2Int(substr($ISOheader, 80, 4)); //$thisfile_iso_primaryVD_raw['unused_3'] = substr($ISOheader, 88, 32); $thisfile_iso_primaryVD_raw['volume_set_size'] = getid3_lib::LittleEndian2Int(substr($ISOheader, 120, 2)); $thisfile_iso_primaryVD_raw['volume_sequence_number'] = getid3_lib::LittleEndian2Int(substr($ISOheader, 124, 2)); $thisfile_iso_primaryVD_raw['logical_block_size'] = getid3_lib::LittleEndian2Int(substr($ISOheader, 128, 2)); $thisfile_iso_primaryVD_raw['path_table_size'] = getid3_lib::LittleEndian2Int(substr($ISOheader, 132, 4)); $thisfile_iso_primaryVD_raw['path_table_l_location'] = getid3_lib::LittleEndian2Int(substr($ISOheader, 140, 2)); $thisfile_iso_primaryVD_raw['path_table_l_opt_location'] = getid3_lib::LittleEndian2Int(substr($ISOheader, 144, 2)); $thisfile_iso_primaryVD_raw['path_table_m_location'] = getid3_lib::LittleEndian2Int(substr($ISOheader, 148, 2)); $thisfile_iso_primaryVD_raw['path_table_m_opt_location'] = getid3_lib::LittleEndian2Int(substr($ISOheader, 152, 2)); $thisfile_iso_primaryVD_raw['root_directory_record'] = substr($ISOheader, 156, 34); $thisfile_iso_primaryVD_raw['volume_set_identifier'] = substr($ISOheader, 190, 128); $thisfile_iso_primaryVD_raw['publisher_identifier'] = substr($ISOheader, 318, 128); $thisfile_iso_primaryVD_raw['data_preparer_identifier'] = substr($ISOheader, 446, 128); $thisfile_iso_primaryVD_raw['application_identifier'] = substr($ISOheader, 574, 128); $thisfile_iso_primaryVD_raw['copyright_file_identifier'] = substr($ISOheader, 702, 37); $thisfile_iso_primaryVD_raw['abstract_file_identifier'] = substr($ISOheader, 739, 37); $thisfile_iso_primaryVD_raw['bibliographic_file_identifier'] = substr($ISOheader, 776, 37); $thisfile_iso_primaryVD_raw['volume_creation_date_time'] = substr($ISOheader, 813, 17); $thisfile_iso_primaryVD_raw['volume_modification_date_time'] = substr($ISOheader, 830, 17); $thisfile_iso_primaryVD_raw['volume_expiration_date_time'] = substr($ISOheader, 847, 17); $thisfile_iso_primaryVD_raw['volume_effective_date_time'] = substr($ISOheader, 864, 17); $thisfile_iso_primaryVD_raw['file_structure_version'] = getid3_lib::LittleEndian2Int(substr($ISOheader, 881, 1)); //$thisfile_iso_primaryVD_raw['unused_4'] = getid3_lib::LittleEndian2Int(substr($ISOheader, 882, 1)); $thisfile_iso_primaryVD_raw['application_data'] = substr($ISOheader, 883, 512); //$thisfile_iso_primaryVD_raw['unused_5'] = substr($ISOheader, 1395, 653); $thisfile_iso_primaryVD['system_identifier'] = trim($thisfile_iso_primaryVD_raw['system_identifier']); $thisfile_iso_primaryVD['volume_identifier'] = trim($thisfile_iso_primaryVD_raw['volume_identifier']); $thisfile_iso_primaryVD['volume_set_identifier'] = trim($thisfile_iso_primaryVD_raw['volume_set_identifier']); $thisfile_iso_primaryVD['publisher_identifier'] = trim($thisfile_iso_primaryVD_raw['publisher_identifier']); $thisfile_iso_primaryVD['data_preparer_identifier'] = trim($thisfile_iso_primaryVD_raw['data_preparer_identifier']); $thisfile_iso_primaryVD['application_identifier'] = trim($thisfile_iso_primaryVD_raw['application_identifier']); $thisfile_iso_primaryVD['copyright_file_identifier'] = trim($thisfile_iso_primaryVD_raw['copyright_file_identifier']); $thisfile_iso_primaryVD['abstract_file_identifier'] = trim($thisfile_iso_primaryVD_raw['abstract_file_identifier']); $thisfile_iso_primaryVD['bibliographic_file_identifier'] = trim($thisfile_iso_primaryVD_raw['bibliographic_file_identifier']); $thisfile_iso_primaryVD['volume_creation_date_time'] = $this->ISOtimeText2UNIXtime($thisfile_iso_primaryVD_raw['volume_creation_date_time']); $thisfile_iso_primaryVD['volume_modification_date_time'] = $this->ISOtimeText2UNIXtime($thisfile_iso_primaryVD_raw['volume_modification_date_time']); $thisfile_iso_primaryVD['volume_expiration_date_time'] = $this->ISOtimeText2UNIXtime($thisfile_iso_primaryVD_raw['volume_expiration_date_time']); $thisfile_iso_primaryVD['volume_effective_date_time'] = $this->ISOtimeText2UNIXtime($thisfile_iso_primaryVD_raw['volume_effective_date_time']); if (($thisfile_iso_primaryVD_raw['volume_space_size'] * 2048) > $info['filesize']) { $this->error('Volume Space Size ('.($thisfile_iso_primaryVD_raw['volume_space_size'] * 2048).' bytes) is larger than the file size ('.$info['filesize'].' bytes) (truncated file?)'); } return true; } /** * @param string $ISOheader * * @return bool */ public function ParseSupplementaryVolumeDescriptor(&$ISOheader) { // ISO integer values are stored Both-Endian format!! // ie 12345 == 0x3039 is stored as $39 $30 $30 $39 in a 4-byte field // shortcuts $info = &$this->getid3->info; $info['iso']['supplementary_volume_descriptor']['raw'] = array(); $thisfile_iso_supplementaryVD = &$info['iso']['supplementary_volume_descriptor']; $thisfile_iso_supplementaryVD_raw = &$thisfile_iso_supplementaryVD['raw']; $thisfile_iso_supplementaryVD_raw['volume_descriptor_type'] = getid3_lib::LittleEndian2Int(substr($ISOheader, 0, 1)); $thisfile_iso_supplementaryVD_raw['standard_identifier'] = substr($ISOheader, 1, 5); if ($thisfile_iso_supplementaryVD_raw['standard_identifier'] != 'CD001') { $this->error('Expected "CD001" at offset ('.($thisfile_iso_supplementaryVD['offset'] + 1).'), found "'.$thisfile_iso_supplementaryVD_raw['standard_identifier'].'" instead'); unset($info['fileformat']); unset($info['iso']); return false; } $thisfile_iso_supplementaryVD_raw['volume_descriptor_version'] = getid3_lib::LittleEndian2Int(substr($ISOheader, 6, 1)); //$thisfile_iso_supplementaryVD_raw['unused_1'] = substr($ISOheader, 7, 1); $thisfile_iso_supplementaryVD_raw['system_identifier'] = substr($ISOheader, 8, 32); $thisfile_iso_supplementaryVD_raw['volume_identifier'] = substr($ISOheader, 40, 32); //$thisfile_iso_supplementaryVD_raw['unused_2'] = substr($ISOheader, 72, 8); $thisfile_iso_supplementaryVD_raw['volume_space_size'] = getid3_lib::LittleEndian2Int(substr($ISOheader, 80, 4)); if ($thisfile_iso_supplementaryVD_raw['volume_space_size'] == 0) { // Supplementary Volume Descriptor not used //unset($thisfile_iso_supplementaryVD); //return false; } //$thisfile_iso_supplementaryVD_raw['unused_3'] = substr($ISOheader, 88, 32); $thisfile_iso_supplementaryVD_raw['volume_set_size'] = getid3_lib::LittleEndian2Int(substr($ISOheader, 120, 2)); $thisfile_iso_supplementaryVD_raw['volume_sequence_number'] = getid3_lib::LittleEndian2Int(substr($ISOheader, 124, 2)); $thisfile_iso_supplementaryVD_raw['logical_block_size'] = getid3_lib::LittleEndian2Int(substr($ISOheader, 128, 2)); $thisfile_iso_supplementaryVD_raw['path_table_size'] = getid3_lib::LittleEndian2Int(substr($ISOheader, 132, 4)); $thisfile_iso_supplementaryVD_raw['path_table_l_location'] = getid3_lib::LittleEndian2Int(substr($ISOheader, 140, 2)); $thisfile_iso_supplementaryVD_raw['path_table_l_opt_location'] = getid3_lib::LittleEndian2Int(substr($ISOheader, 144, 2)); $thisfile_iso_supplementaryVD_raw['path_table_m_location'] = getid3_lib::LittleEndian2Int(substr($ISOheader, 148, 2)); $thisfile_iso_supplementaryVD_raw['path_table_m_opt_location'] = getid3_lib::LittleEndian2Int(substr($ISOheader, 152, 2)); $thisfile_iso_supplementaryVD_raw['root_directory_record'] = substr($ISOheader, 156, 34); $thisfile_iso_supplementaryVD_raw['volume_set_identifier'] = substr($ISOheader, 190, 128); $thisfile_iso_supplementaryVD_raw['publisher_identifier'] = substr($ISOheader, 318, 128); $thisfile_iso_supplementaryVD_raw['data_preparer_identifier'] = substr($ISOheader, 446, 128); $thisfile_iso_supplementaryVD_raw['application_identifier'] = substr($ISOheader, 574, 128); $thisfile_iso_supplementaryVD_raw['copyright_file_identifier'] = substr($ISOheader, 702, 37); $thisfile_iso_supplementaryVD_raw['abstract_file_identifier'] = substr($ISOheader, 739, 37); $thisfile_iso_supplementaryVD_raw['bibliographic_file_identifier'] = substr($ISOheader, 776, 37); $thisfile_iso_supplementaryVD_raw['volume_creation_date_time'] = substr($ISOheader, 813, 17); $thisfile_iso_supplementaryVD_raw['volume_modification_date_time'] = substr($ISOheader, 830, 17); $thisfile_iso_supplementaryVD_raw['volume_expiration_date_time'] = substr($ISOheader, 847, 17); $thisfile_iso_supplementaryVD_raw['volume_effective_date_time'] = substr($ISOheader, 864, 17); $thisfile_iso_supplementaryVD_raw['file_structure_version'] = getid3_lib::LittleEndian2Int(substr($ISOheader, 881, 1)); //$thisfile_iso_supplementaryVD_raw['unused_4'] = getid3_lib::LittleEndian2Int(substr($ISOheader, 882, 1)); $thisfile_iso_supplementaryVD_raw['application_data'] = substr($ISOheader, 883, 512); //$thisfile_iso_supplementaryVD_raw['unused_5'] = substr($ISOheader, 1395, 653); $thisfile_iso_supplementaryVD['system_identifier'] = trim($thisfile_iso_supplementaryVD_raw['system_identifier']); $thisfile_iso_supplementaryVD['volume_identifier'] = trim($thisfile_iso_supplementaryVD_raw['volume_identifier']); $thisfile_iso_supplementaryVD['volume_set_identifier'] = trim($thisfile_iso_supplementaryVD_raw['volume_set_identifier']); $thisfile_iso_supplementaryVD['publisher_identifier'] = trim($thisfile_iso_supplementaryVD_raw['publisher_identifier']); $thisfile_iso_supplementaryVD['data_preparer_identifier'] = trim($thisfile_iso_supplementaryVD_raw['data_preparer_identifier']); $thisfile_iso_supplementaryVD['application_identifier'] = trim($thisfile_iso_supplementaryVD_raw['application_identifier']); $thisfile_iso_supplementaryVD['copyright_file_identifier'] = trim($thisfile_iso_supplementaryVD_raw['copyright_file_identifier']); $thisfile_iso_supplementaryVD['abstract_file_identifier'] = trim($thisfile_iso_supplementaryVD_raw['abstract_file_identifier']); $thisfile_iso_supplementaryVD['bibliographic_file_identifier'] = trim($thisfile_iso_supplementaryVD_raw['bibliographic_file_identifier']); $thisfile_iso_supplementaryVD['volume_creation_date_time'] = $this->ISOtimeText2UNIXtime($thisfile_iso_supplementaryVD_raw['volume_creation_date_time']); $thisfile_iso_supplementaryVD['volume_modification_date_time'] = $this->ISOtimeText2UNIXtime($thisfile_iso_supplementaryVD_raw['volume_modification_date_time']); $thisfile_iso_supplementaryVD['volume_expiration_date_time'] = $this->ISOtimeText2UNIXtime($thisfile_iso_supplementaryVD_raw['volume_expiration_date_time']); $thisfile_iso_supplementaryVD['volume_effective_date_time'] = $this->ISOtimeText2UNIXtime($thisfile_iso_supplementaryVD_raw['volume_effective_date_time']); if (($thisfile_iso_supplementaryVD_raw['volume_space_size'] * $thisfile_iso_supplementaryVD_raw['logical_block_size']) > $info['filesize']) { $this->error('Volume Space Size ('.($thisfile_iso_supplementaryVD_raw['volume_space_size'] * $thisfile_iso_supplementaryVD_raw['logical_block_size']).' bytes) is larger than the file size ('.$info['filesize'].' bytes) (truncated file?)'); } return true; } /** * @return bool */ public function ParsePathTable() { $info = &$this->getid3->info; if (!isset($info['iso']['supplementary_volume_descriptor']['raw']['path_table_l_location']) && !isset($info['iso']['primary_volume_descriptor']['raw']['path_table_l_location'])) { return false; } if (isset($info['iso']['supplementary_volume_descriptor']['raw']['path_table_l_location'])) { $PathTableLocation = $info['iso']['supplementary_volume_descriptor']['raw']['path_table_l_location']; $PathTableSize = $info['iso']['supplementary_volume_descriptor']['raw']['path_table_size']; $TextEncoding = 'UTF-16BE'; // Big-Endian Unicode } else { $PathTableLocation = $info['iso']['primary_volume_descriptor']['raw']['path_table_l_location']; $PathTableSize = $info['iso']['primary_volume_descriptor']['raw']['path_table_size']; $TextEncoding = 'ISO-8859-1'; // Latin-1 } if (($PathTableLocation * 2048) > $info['filesize']) { $this->error('Path Table Location specifies an offset ('.($PathTableLocation * 2048).') beyond the end-of-file ('.$info['filesize'].')'); return false; } $info['iso']['path_table']['offset'] = $PathTableLocation * 2048; $this->fseek($info['iso']['path_table']['offset']); $info['iso']['path_table']['raw'] = $this->fread($PathTableSize); $offset = 0; $pathcounter = 1; $FullPathArray = array(); while ($offset < $PathTableSize) { // shortcut $info['iso']['path_table']['directories'][$pathcounter] = array(); $thisfile_iso_pathtable_directories_current = &$info['iso']['path_table']['directories'][$pathcounter]; $thisfile_iso_pathtable_directories_current['length'] = getid3_lib::LittleEndian2Int(substr($info['iso']['path_table']['raw'], $offset, 1)); $offset += 1; $thisfile_iso_pathtable_directories_current['extended_length'] = getid3_lib::LittleEndian2Int(substr($info['iso']['path_table']['raw'], $offset, 1)); $offset += 1; $thisfile_iso_pathtable_directories_current['location_logical'] = getid3_lib::LittleEndian2Int(substr($info['iso']['path_table']['raw'], $offset, 4)); $offset += 4; $thisfile_iso_pathtable_directories_current['parent_directory'] = getid3_lib::LittleEndian2Int(substr($info['iso']['path_table']['raw'], $offset, 2)); $offset += 2; $thisfile_iso_pathtable_directories_current['name'] = substr($info['iso']['path_table']['raw'], $offset, $thisfile_iso_pathtable_directories_current['length']); $offset += $thisfile_iso_pathtable_directories_current['length'] + ($thisfile_iso_pathtable_directories_current['length'] % 2); $thisfile_iso_pathtable_directories_current['name_ascii'] = getid3_lib::iconv_fallback($TextEncoding, $info['encoding'], $thisfile_iso_pathtable_directories_current['name']); $thisfile_iso_pathtable_directories_current['location_bytes'] = $thisfile_iso_pathtable_directories_current['location_logical'] * 2048; if ($pathcounter == 1) { $thisfile_iso_pathtable_directories_current['full_path'] = '/'; } else { $thisfile_iso_pathtable_directories_current['full_path'] = $info['iso']['path_table']['directories'][$thisfile_iso_pathtable_directories_current['parent_directory']]['full_path'].$thisfile_iso_pathtable_directories_current['name_ascii'].'/'; } $FullPathArray[] = $thisfile_iso_pathtable_directories_current['full_path']; $pathcounter++; } return true; } /** * @param array $directorydata * * @return array */ public function ParseDirectoryRecord($directorydata) { $info = &$this->getid3->info; if (isset($info['iso']['supplementary_volume_descriptor'])) { $TextEncoding = 'UTF-16BE'; // Big-Endian Unicode } else { $TextEncoding = 'ISO-8859-1'; // Latin-1 } $this->fseek($directorydata['location_bytes']); $DirectoryRecordData = $this->fread(1); $DirectoryRecord = array(); while (ord($DirectoryRecordData[0]) > 33) { $DirectoryRecordData .= $this->fread(ord($DirectoryRecordData[0]) - 1); $ThisDirectoryRecord = array(); $ThisDirectoryRecord['raw']['length'] = getid3_lib::LittleEndian2Int(substr($DirectoryRecordData, 0, 1)); $ThisDirectoryRecord['raw']['extended_attribute_length'] = getid3_lib::LittleEndian2Int(substr($DirectoryRecordData, 1, 1)); $ThisDirectoryRecord['raw']['offset_logical'] = getid3_lib::LittleEndian2Int(substr($DirectoryRecordData, 2, 4)); $ThisDirectoryRecord['raw']['filesize'] = getid3_lib::LittleEndian2Int(substr($DirectoryRecordData, 10, 4)); $ThisDirectoryRecord['raw']['recording_date_time'] = substr($DirectoryRecordData, 18, 7); $ThisDirectoryRecord['raw']['file_flags'] = getid3_lib::LittleEndian2Int(substr($DirectoryRecordData, 25, 1)); $ThisDirectoryRecord['raw']['file_unit_size'] = getid3_lib::LittleEndian2Int(substr($DirectoryRecordData, 26, 1)); $ThisDirectoryRecord['raw']['interleave_gap_size'] = getid3_lib::LittleEndian2Int(substr($DirectoryRecordData, 27, 1)); $ThisDirectoryRecord['raw']['volume_sequence_number'] = getid3_lib::LittleEndian2Int(substr($DirectoryRecordData, 28, 2)); $ThisDirectoryRecord['raw']['file_identifier_length'] = getid3_lib::LittleEndian2Int(substr($DirectoryRecordData, 32, 1)); $ThisDirectoryRecord['raw']['file_identifier'] = substr($DirectoryRecordData, 33, $ThisDirectoryRecord['raw']['file_identifier_length']); $ThisDirectoryRecord['file_identifier_ascii'] = getid3_lib::iconv_fallback($TextEncoding, $info['encoding'], $ThisDirectoryRecord['raw']['file_identifier']); $ThisDirectoryRecord['filesize'] = $ThisDirectoryRecord['raw']['filesize']; $ThisDirectoryRecord['offset_bytes'] = $ThisDirectoryRecord['raw']['offset_logical'] * 2048; $ThisDirectoryRecord['file_flags']['hidden'] = (bool) ($ThisDirectoryRecord['raw']['file_flags'] & 0x01); $ThisDirectoryRecord['file_flags']['directory'] = (bool) ($ThisDirectoryRecord['raw']['file_flags'] & 0x02); $ThisDirectoryRecord['file_flags']['associated'] = (bool) ($ThisDirectoryRecord['raw']['file_flags'] & 0x04); $ThisDirectoryRecord['file_flags']['extended'] = (bool) ($ThisDirectoryRecord['raw']['file_flags'] & 0x08); $ThisDirectoryRecord['file_flags']['permissions'] = (bool) ($ThisDirectoryRecord['raw']['file_flags'] & 0x10); $ThisDirectoryRecord['file_flags']['multiple'] = (bool) ($ThisDirectoryRecord['raw']['file_flags'] & 0x80); $ThisDirectoryRecord['recording_timestamp'] = $this->ISOtime2UNIXtime($ThisDirectoryRecord['raw']['recording_date_time']); if ($ThisDirectoryRecord['file_flags']['directory']) { $ThisDirectoryRecord['filename'] = $directorydata['full_path']; } else { $ThisDirectoryRecord['filename'] = $directorydata['full_path'].$this->ISOstripFilenameVersion($ThisDirectoryRecord['file_identifier_ascii']); $info['iso']['files'] = getid3_lib::array_merge_clobber($info['iso']['files'], getid3_lib::CreateDeepArray($ThisDirectoryRecord['filename'], '/', $ThisDirectoryRecord['filesize'])); } $DirectoryRecord[] = $ThisDirectoryRecord; $DirectoryRecordData = $this->fread(1); } return $DirectoryRecord; } /** * @param string $ISOfilename * * @return string */ public function ISOstripFilenameVersion($ISOfilename) { // convert 'filename.ext;1' to 'filename.ext' if (!strstr($ISOfilename, ';')) { return $ISOfilename; } else { return substr($ISOfilename, 0, strpos($ISOfilename, ';')); } } /** * @param string $ISOtime * * @return int|false */ public function ISOtimeText2UNIXtime($ISOtime) { $UNIXyear = (int) substr($ISOtime, 0, 4); $UNIXmonth = (int) substr($ISOtime, 4, 2); $UNIXday = (int) substr($ISOtime, 6, 2); $UNIXhour = (int) substr($ISOtime, 8, 2); $UNIXminute = (int) substr($ISOtime, 10, 2); $UNIXsecond = (int) substr($ISOtime, 12, 2); if (!$UNIXyear) { return false; } return gmmktime($UNIXhour, $UNIXminute, $UNIXsecond, $UNIXmonth, $UNIXday, $UNIXyear); } /** * @param string $ISOtime * * @return int */ public function ISOtime2UNIXtime($ISOtime) { // Represented by seven bytes: // 1: Number of years since 1900 // 2: Month of the year from 1 to 12 // 3: Day of the Month from 1 to 31 // 4: Hour of the day from 0 to 23 // 5: Minute of the hour from 0 to 59 // 6: second of the minute from 0 to 59 // 7: Offset from Greenwich Mean Time in number of 15 minute intervals from -48 (West) to +52 (East) $UNIXyear = ord($ISOtime[0]) + 1900; $UNIXmonth = ord($ISOtime[1]); $UNIXday = ord($ISOtime[2]); $UNIXhour = ord($ISOtime[3]); $UNIXminute = ord($ISOtime[4]); $UNIXsecond = ord($ISOtime[5]); $GMToffset = $this->TwosCompliment2Decimal(ord($ISOtime[5])); return gmmktime($UNIXhour, $UNIXminute, $UNIXsecond, $UNIXmonth, $UNIXday, $UNIXyear); } /** * @param int $BinaryValue * * @return int */ public function TwosCompliment2Decimal($BinaryValue) { // http://sandbox.mc.edu/~bennet/cs110/tc/tctod.html // First check if the number is negative or positive by looking at the sign bit. // If it is positive, simply convert it to decimal. // If it is negative, make it positive by inverting the bits and adding one. // Then, convert the result to decimal. // The negative of this number is the value of the original binary. if ($BinaryValue & 0x80) { // negative number return (0 - ((~$BinaryValue & 0xFF) + 1)); } else { // positive number return $BinaryValue; } } }
Save File
Cancel