PHP ISO Library

PHP Library used to read metadata and extract information from ISO files based on php-iso-file

This library follows the ISO 9660 / ECMA-119 standard.

Basic concepts

• IsoFile - main ISO file object, contains one more descriptors
• Descriptor - descriptor object which can have one of the following types defined in Type class:
  • BOOT_RECORD_DESC : Boot object
  • PRIMARY_VOLUME_DESC : PrimaryVolume object
  • SUPPLEMENTARY_VOLUME_DESC : SupplementaryVolume object
  • PARTITION_VOLUME_DESC : Partition object
  • TERMINATOR_DESC : Terminator object
  • upon initialization of the IsoFile object, the descriptors will be populated automatically
• Volume descriptors contain path table inside which can be loaded using loadTable
  • PathTableRecord - object which contains the record information for a file/directory
• Each class contains various properties which can be used to interact with them, most of them public

Known limitations

• ISO extensions currently not supported:
  • El Torito
  • Joliet
  • Rock Ridge
• UDF file format not supported
• Reading metadata requires manually processing the descriptors
  • Some Iterator implementation would be nice to have

Installation

This class can easily be installed via Composer:
composer require indy2kro/php-iso

CLI tool

This tool also provides a CLI tool that can be used to view information about ISO files - bin\isotool:

Description:
  Tool to process ISO files

Usage:
  isotool [options] --file=<path>

Options:
  -f, --file                     Path for the ISO file (mandatory)
  -x, --extract=<extract_path>   Extract files in the given location

Sample usage:

Input ISO file: fixtures/1mb.iso

Number of descriptors: 3
  - Primary volume descriptor
   - System ID: Win32
   - Volume ID: 25_12_2024
   - App ID: PowerISO
   - Volume Space Size: 542
   - Volume Set Size: 1
   - Volume SeqNum: 1
   - Block size: 2048
   - Volume Set ID: 
   - Publisher ID: 
   - Preparer ID: 
   - Copyright File ID: 
   - Abstract File ID: 
   - Bibliographic File ID: 
   - Creation Date: 2024-12-25 14:01:20
   - Modification Date: 2024-12-25 14:01:20
   - Expiration Date: 
   - Effective Date: 
   - Files:
.
..
1MB.PNG

  - Supplementary volume descriptor
   - System ID: Win32
   - Volume ID: 25_12_2024
   - App ID: PowerISO
   - Volume Space Size: 542
   - Volume Set Size: 1
   - Volume SeqNum: 1
   - Block size: 2048
   - Volume Set ID: 
   - Publisher ID: 
   - Preparer ID: 
   - Copyright File ID: ?
   - Abstract File ID: ?
   - Bibliographic File ID: ?
   - Creation Date: 2024-12-25 14:01:20
   - Modification Date: 2024-12-25 14:01:20
   - Expiration Date: 
   - Effective Date: 
   - Files:
.
..
1mb.png

  - Terminator descriptor

Usage

<?php

use PhpIso\IsoFile;
use PhpIso\Descriptor\Type;
use PhpIso\Descriptor\PrimaryVolume;
use PhpIso\FileDirectory;
use PhpIso\PathTableRecord;

$isoFilePath = 'test.iso';

$isoFile = new IsoFile($isoFilePath);

// you can process each descriptor using $isoFile->descriptors directly

/** @var PrimaryVolume $primaryVolumeDescriptor */
$primaryVolumeDescriptor = $isoFile->descriptors[Type::PRIMARY_VOLUME_DESC];

// get the path table
$pathTable = $primaryVolumeDescriptor->loadTable($isoFile);

$paths = [];

/** @var PathTableRecord $pathRecord */
foreach ($pathTable as $pathRecord) {
    $currentPath = $pathRecord->getFullPath($pathTable);

    $paths[$currentPath] = [];

    // check extents
    $extents = $pathRecord->loadExtents($isoFile, $primaryVolumeDescriptor->blockSize);

    if ($extents !== false) {
        /** @var FileDirectory $extentRecord */
        foreach ($extents as $extentRecord) {
            $path = $extentRecord->fileId;
            if ($extentRecord->isDirectory()) {
                $path .= '/';
            }
            $paths[$currentPath][] = $path;
        }
    }
}

print_r($paths);