- Affecting PHP’s Behaviour
- APC — Alternative PHP Cache
- APD — Advanced PHP debugger
- bcompiler — PHP bytecode Compiler
- Error Handling — Error Handling and Logging
- htscanner — htaccess-like support for all SAPIs
- inclued — Inclusion hierarchy viewer
- PHP Options/Info — PHP Options and Information
- Memtrack
- Object overloading — Object property and method call overloading
- Output Control — Output Buffering Control
- runkit
- scream — Break the silence operator
- WinCache — Windows Cache for PHP
- Xhprof — Hierarchical Profiler
- Audio Formats Manipulation
- Authentication Services
- Date and Time Related Extensions
- Command Line Specific Extensions
- Compression and Archive Extensions
- Credit Card Processing
- Cryptography Extensions
- Database Extensions
- File System Related Extensions
- Direct IO
- Directories
- Fileinfo — File Information
- Filesystem
- Inotify
- Mimetype
- Proctitle
- xattr
- xdiff
- Human Language and Character Encoding Support
- Image Processing and Generation
- Exif — Exchangeable image information
- GD — Image Processing and GD
- ImageMagick — Image Processing (ImageMagick)
- Gmagick
- Cairo
- Mail Related Extensions
- Mathematical Extensions
- BC Math — BCMath Arbitrary Precision Mathematics
- GMP — GNU Multiple Precision
- Math — Mathematical Functions
- Statistics
- Non-Text MIME Output
- Process Control Extensions
- Program execution — System program execution
- Expect
- Libevent
- PCNTL — Process Control
- POSIX
- Semaphore — Semaphore, Shared Memory and IPC
- Shared Memory
- Other Basic Extensions
- Other Services
- AMQP
- chdb — Constant hash database
- cURL — Client URL Library
- FAM — File Alteration Monitor
- FTP
- Gupnp
- Hyperwave
- Hyperwave API
- HTTP
- Java — PHP / Java Integration
- LDAP — Lightweight Directory Access Protocol
- Lotus Notes
- Memcache
- Memcached
- Gearman
- mqseries
- Gopher — Net Gopher
- Network
- RRD — RRDtool
- SAM — Simple Asynchronous Messaging
- SNMP
- Sockets
- SSH2 — Secure Shell2
- Stomp — Stomp Client
- SVM — Support Vector Machine
- SVN — Subversion
- TCP — TCP Wrappers
- YAZ
- YP/NIS
- Search Engine Extensions
- mnoGoSearch
- Sphinx — Sphinx Client
- Swish — Swish Indexing
- Solr — Apache Solr
- Server Specific Extensions
- Session Extensions
- Msession — Mohawk Software Session Handler Functions
- Sessions — Session Handling
- Session PgSQL — PostgreSQL Session Save Handler
- Text Processing
- BBCode — Bulletin Board Code
- PCRE — Regular Expressions (Perl-Compatible)
- POSIX Regex — Regular Expression (POSIX Extended)
- ssdeep — ssdeep Fuzzy Hashing
- Strings
- Variable and Type Related Extensions
- Arrays
- Classes/Objects — Class/Object Information
- Classkit
- Ctype — Character type checking
- Filter — Data Filtering
- Function Handling
- Object Aggregation — Object Aggregation/Composition [PHP 4]
- Reflection
- Variable handling
- Web Services
- Windows Only Extensions
- XML Manipulation
- DOM — Document Object Model
- DOM XML (PHP 4)
- libxml
- qtdom
- SDO — Service Data Objects
- SDO-DAS-Relational — SDO Relational Data Access Service
- SDO DAS XML — SDO XML Data Access Service
- SimpleXML
- WDDX
- XML Parser
- XMLReader
- XMLWriter
- XSL
- XSLT (PHP4)
(php.net)
