Extension List/CategorizationThis appendix categorizes more than 150 extensions documented in the PHP Manual by several criteria.'> Alphabetical'> Purpose'> Basic PHP Extensions'> Variable and Type Related Extensions'> Text Processing'> Affecting PHP's Behaviour"> Session Extensions'> Other Basic Extensions'> Database Extensions'> Abstraction Layers'> Vendor Specific Database Extensions'> XML Manipulation'> Web Services'> Credit Card Processing'> Math and Cryptography'> Mathematical Extensions'> Cryptography Extensions'> Human Language and Character Encoding Support'> File System and Process Control'> File System Related Extensions'> Process Control Extensions'> Accessing Services'> Mail Related Extensions'> Authentication Services'> Other Services'> Compression and Archive Extensions'> Date and Time Related Extensions'> Utilization Area Specific Extensions'> Non-Text MIME Output'> Image Processing and Generation'> Audio Formats Manipulation'> Command Line Specific Extensions'> Windows Only Extensions'> Server Specific Extensions'> Membership'> Core ExtensionsThese are not actual extensions. They are part of the PHP core and cannot be left out of a PHP binary with compilation options.'> Bundled ExtensionsThese extensions are bundled with PHP.'> External ExtensionsThese extensions are bundled with PHP but in order to compile them, external libraries will be needed.'> PECL ExtensionsThese extensions are available from PECL. They may require external libraries. More PECL extensions exist but they are not documented in the PHP manual yet.'> StateThis part lists extensions not intended for the production use - they are either too "old" (deprecated) or "new" (experimental).'> Deprecated ExtensionsThese extensions have been deprecated usually in the favor of some other extensions.'> Experimental ExtensionsThe behaviour of these extensions - including the names of their functions and anything else documented about these extensions - may change without notice in a future release of PHP. Use these extensions at your own risk.'>