Installation on Windows systems
PHP Manual

Installation of extensions on Windows

After installing PHP and a web server on Windows, you will probably want to install some extensions for added functionality. You can choose which extensions you would like to load when PHP starts by modifying your php.ini. You can also load a module dynamically in your script using dl().

The DLLs for PHP extensions are prefixed with php_.

Many extensions are built into the Windows version of PHP. This means additional DLL files, and the extension directive, are not used to load these extensions. The Windows PHP Extensions table lists extensions that require, or used to require, additional PHP DLL files. Here's a list of built in extensions (updated PHP 5.0.4): BCMath, Caledar, COM, Ctype, DOM, FTP, LibXML, Iconv, ODBC, PCRE, Session, SimpleXML, SPL, SQLite, WDDX, XML and Zlib.

The default location PHP searches for extensions is C:\php5. To change this setting to reflect your setup of PHP edit your php.ini file:

Note: If you are running a server module version of PHP remember to restart your web server to reflect your changes to php.ini.

The following table describes some of the extensions available and required additional dlls.

PHP Extensions
Extension Description Notes
php_bz2.dll bzip2 compression functions None
php_calendar.dll Calendar conversion functions None
php_crack.dll Crack functions None
php_ctype.dll ctype family functions None
php_curl.dll CURL, Client URL library functions Requires: libeay32.dll, ssleay32.dll (bundled)
php_dba.dll DBA: DataBase (dbm-style) Abstraction layer functions None
php_dbase.dll dBase functions None
php_dbx.dll dbx functions  
php_exif.dll EXIF functions php_mbstring.dll. And, php_exif.dll must be loaded after php_mbstring.dll in php.ini.
php_fbsql.dll FrontBase functions None
php_fdf.dll FDF: Forms Data Format functions. Requires: fdftk.dll (bundled)
php_filepro.dll filePro functions Read-only access
php_ftp.dll FTP functions None
php_gd2.dll GD library image functions GD2
php_gettext.dll Gettext functions PHP <= 4.2.0 requires gnu_gettext.dll (bundled), PHP >= 4.2.3 requires libintl-1.dll, iconv.dll (bundled).
php_hyperwave.dll HyperWave functions None
php_iconv.dll ICONV characterset conversion Requires: iconv-1.3.dll (bundled), iconv.dll
php_ifx.dll Informix functions Requires: Informix libraries
php_iisfunc.dll IIS management functions None
php_imap.dll IMAP POP3 and NNTP functions None
php_ingres.dll Ingres functions Requires: Ingres libraries
php_interbase.dll InterBase functions Requires: gds32.dll (bundled)
php_ldap.dll LDAP functions Requires libeay32.dll, ssleay32.dll (bundled)
php_mbstring.dll Multi-Byte String functions None
php_mcrypt.dll Mcrypt Encryption functions Requires: libmcrypt.dll
php_mhash.dll Mhash functions Requires: libmhash.dll (bundled)
php_mime_magic.dll Mimetype functions Requires: magic.mime (bundled)
php_ming.dll Ming functions for Flash None
php_msql.dll mSQL functions Requires: msql.dll (bundled)
php_mssql.dll MSSQL functions Requires: ntwdblib.dll (bundled)
php_mysql.dll MySQL functions Requires libmysql.dll (bundled)
php_mysqli.dll MySQLi functions Requires libmysql.dll (libmysqli.dll in PHP <= 5.0.2) (bundled)
php_oci8.dll Oracle 8 functions Requires: Oracle 8.1+ client libraries
php_openssl.dll OpenSSL functions Requires: libeay32.dll (bundled)
php_pdf.dll PDF functions None
php_pgsql.dll PostgreSQL functions None
php_shmop.dll Shared Memory functions None
php_snmp.dll SNMP get and walk functions NT only!
php_soap.dll SOAP functions None
php_sockets.dll Socket functions None
php_sybase_ct.dll Sybase functions Requires: Sybase client libraries
php_tidy.dll Tidy functions None
php_tokenizer.dll Tokenizer functions None
php_w32api.dll W32api functions None
php_xmlrpc.dll XML-RPC functions Requires: iconv.dll (bundled)
php_xslt.dll XSLT functions Requires sablot.dll, expat.dll, iconv.dll (bundled).
php_yaz.dll YAZ functions Requires: yaz.dll (bundled)
php_zip.dll Zip File functions Read only access
php_zlib.dll ZLib compression functions None

Installation on Windows systems
PHP Manual