Alphabetical
- Apache
- APC
- APD
- Arrays
- BBCode
- BC Math
- bcompiler
- Bzip2
- Calendar
- chdb
- Classkit
- Classes/Objects
- COM
- Crack
- Ctype
- cURL
- Cyrus
- Date/Time
- DBA
- dBase
- DB++
- dbx
- Direct IO
- Directories
- DOM
- DOM XML (PHP 4)
- .NET
- Enchant
- Error Handling
- Program execution
- Exif
- Expect
- FAM
- FrontBase
- FDF
- Fileinfo
- filePro
- Filesystem
- Filter
- FriBiDi
- FTP
- Function Handling
- GeoIP
- Gettext
- GMP
- GnuPG
- haru
- Hash
- HTTP
- Hyperwave API
- Hyperwave
- Firebird/InterBase
- IBM DB2
- iconv
- ID3
- Informix
- IIS
- GD
- ImageMagick
- IMAP
- inclued
- PHP Options/Info
- Ingres
- Inotify
- intl
- Java
- JSON
- KADM5
- LDAP
- libxml
- LZF
- Mailparse
- Math
- MaxDB
- Multibyte String
- Mcrypt
- MCVE
- Memcache
- Mhash
- Mimetype
- Ming
- Misc.
- mnoGoSearch
- Mongo
- mqseries
- Msession
- mSQL
- Mssql
- MySQL
- Mysqli
- Ncurses
- Gopher
- Network
- Newt
- YP/NIS
- Lotus Notes
- NSAPI
- Object Aggregation
- OCI8
- oggvorbis
- OpenAL
- OpenSSL
- Output Control
- Object overloading
- Ovrimos SQL
- Paradox
- Parsekit
- PCNTL
- PCRE
- PDO
- PostgreSQL
- Phar
- POSIX
- Printer
- PS
- Pspell
- qtdom
- Radius
- Rar
- Readline
- Recode
- POSIX Regex
- RPM Reader
- runkit
- SAM
- SCA
- scream
- SDO
- SDO-DAS-Relational
- SDO DAS XML
- Semaphore
- Sessions
- Session PgSQL
- Shared Memory
- SimpleXML
- SNMP
- SOAP
- Sockets
- Sphinx
- SPL
- SPL Types
- SPPLUS
- SQLite3
- SQLite
- SSH2
- Statistics
- Streams
- Strings
- SVN
- SWF
- Swish
- Sybase
- TCP
- Tidy
- Tokenizer
- ODBC
- URLs
- Variable handling
- vpopmail
- W32api
- WDDX
- win32ps
- win32service
- xattr
- xdiff
- XML Parser
- XMLReader
- XML-RPC
- XMLWriter
- XSL
- XSLT (PHP4)
- YAZ
- Zip
- Zlib