Note: These are only used at compile time. If you want to alter PHP's runtime configuration, please go to Configuration.
The following is a complete list of options supported by the PHP 3 and PHP 4 configure scripts, used when compiling in Unix-like environments. Some are available in PHP 3, some in PHP 4, and some in both, as noted. There are many options the names of which have changed between PHP 3 and PHP 4, but which accomplish the same things. These entries are cross-referenced to each other, so if you have a problem getting your PHP 3-era configuration options to work, check here to see whether the names have changed.
PHP 3, PHP 4: Include Adabas D support. DIR is the Adabas base install directory, defaults to /usr/local.
PHP 3: Option not available in PHP 3
PHP 4: Build DBA as a shared module
PHP 3: Option not available; use --with-dbase instead.
PHP 4: Enable the bundled dbase library. No external libraries are required.
PHP 3: Include the bundled dbase library. No external libraries are required.
PHP 4: Option not available; use --enable-dbase instead.
PHP 3, PHP 4: Include Berkeley DB2 support
PHP 3: Option not available in PHP 3
PHP 4: Include Berkeley DB3 support
PHP 3, PHP 4: Include DBM support
PHP 3: Option not available in PHP 3
PHP 4: Include DBMaker support. DIR is the DBMaker base install directory, defaults to where the latest version of DBMaker is installed (such as /home/dbmaker/3.6).
PHP 3, PHP 4: Include Empress support. DIR is the Empress base install directory, defaults to $EMPRESSPATH
PHP 3: Option not available; use --with-filepro instead.
PHP 4: Enable the bundled read-only filePro support. No external libraries are required.
PHP 3: Include the bundled read-only filePro support. No external libraries are required.
PHP 4: Option not available; use --enable-filepro instead.
PHP 3, PHP 4: Include GDBM support
PHP 3, PHP 4: Include Hyperwave support
PHP 3, PHP 4: Include IBM DB2 support. DIR is the DB2 base install directory, defaults to /home/db2inst1/sqllib.
PHP 3, PHP 4: Include Informix support. DIR is the Informix base install directory, defaults to nothing.
PHP 3: Option not available in PHP 3
PHP 4: Include Ingres II support. DIR is the Ingres base directory (default /II/ingres)
PHP 3, PHP 4: Include InterBase support. DIR is the InterBase base install directory, which defaults to /usr/interbase.
PHP 3: Include LDAP support. DIR is the LDAP base install directory. Defaults to /usr and /usr/local
PHP 4: Include LDAP support. DIR is the LDAP base install directory.
This provides LDAP (Lightweight Directory Access Protocol support). The parameter is the LDAP base install directory, defaults to /usr/local/ldap.
More information about LDAP can be found in RFC1777 and RFC1778.
PHP 3, PHP 4: Enables mSQL support. The parameter to this option is the mSQL install directory and defaults to /usr/local/Hughes. This is the default directory of the mSQL 2.0 distribution. configure automatically detects which mSQL version you are running and PHP supports both 1.0 and 2.0, but if you compile PHP with mSQL 1.0, you can only access mSQL 1.0 databases, and vice-versa.
See also mSQL Configuration Directives in the configuration file.
PHP 3: Include MySQL support. DIR is the MySQL base install directory, defaults to searching through a number of common places for the MySQL files.
PHP 4: Include MySQL support. DIR is the MySQL base directory. If unspecified, the bundled MySQL library will be used. This option is turned on by default.
See also MySQL Configuration Directives in the configuration file.
PHP 3, PHP 4: Include NDBM support
PHP 3: Option not available in PHP 3
PHP 4: Include Oracle-oci8 support. Default DIR is ORACLE_HOME.
PHP 3: Include Oracle database support. DIR is Oracle's home directory, defaults to $ORACLE_HOME.
PHP 4: Include Oracle-oci7 support. Default DIR is ORACLE_HOME.
Includes Oracle support. Has been tested and should be working at least with Oracle versions 7.0 through 7.3. The parameter is the ORACLE_HOME directory. You do not have to specify this parameter if your Oracle environment has been set up.
PHP 3: Include PostgresSQL support. DIR is the PostgresSQL base install directory, which defaults to /usr/local/pgsql.
PHP 4: Include PostgreSQL support. DIR is the PostgreSQL base install directory, which defaults to /usr/local/pgsql. Set DIR to shared to build as a dl, or shared,DIR to build as a dl and still specify DIR.
See also Postgres Configuration Directives in the configuration file.
PHP 3, PHP 4: Include Solid support. DIR is the Solid base install directory, defaults to /usr/local/solid
PHP 3, PHP 4: Include Sybase-CT support. DIR is the Sybase home directory, defaults to /home/sybase.
See also Sybase-CT Configuration Directives in the configuration file.
PHP 3, PHP 4: Include Sybase-DB support. DIR is the Sybase home directory, which defaults to /home/sybase.
See also Sybase Configuration Directives in the configuration file.
PHP 3, PHP 4: Include OpenLink ODBC support. DIR is the OpenLink base install directory, defaults to /usr/local/openlink.
PHP 3, PHP 4: Include iODBC support. DIR is the iODBC base install directory, defaults to /usr/local.
This feature was first developed for iODBC Driver Manager, a freely redistributable ODBC driver manager which runs under many flavors of UNIX.
PHP 3, PHP 4: Includes support for an arbitrary custom ODBC library. The parameter is the base directory and defaults to /usr/local.
This option implies that you have defined CUSTOM_ODBC_LIBS when you run the configure script. You also must have a valid odbc.h header somewhere in your include path. If you don't have one, create it and include your specific header from there. Your header may also require some extra definitions, particularly when it is multiplatform. Define them in CFLAGS.
For example, you can use Sybase SQL Anywhere on QNX as following: CFLAGS=-DODBC_QNX LDFLAGS=-lunix CUSTOM_ODBC_LIBS="-ldblib -lodbc" ./configure --with-custom-odbc=/usr/lib/sqlany50
PHP 3: Disable unified ODBC support. Only applicable if iODBC, Adabas, Solid, Velocis or a custom ODBC interface is enabled.
PHP 4: Option not available in PHP 4
The Unified ODBC module, which is a common interface to all the databases with ODBC-based interfaces, such as Solid, IBM DB2 and Adabas D. It also works for normal ODBC libraries. Has been tested with iODBC, Solid, Adabas D, IBM DB2 and Sybase SQL Anywhere. Requires that one (and only one) of these modules or the Velocis module is enabled, or a custom ODBC library specified. This option is only applicable if one of the following options is used: --with-iodbc, --with-solid, --with-ibm-db2, --with-adabas, --with-velocis, or --with-custom-odbc.
See also Unified ODBC Configuration Directives in the configuration file.
PHP 3: Option not available in PHP 3
PHP 4: Include unixODBC support. DIR is the unixODBC base install directory, defaults to /usr/local.
PHP 3, PHP 4: Include Velocis support. DIR is the Velocis base install directory, defaults to /usr/local/velocis.
PHP 3: Option not available in PHP 3
PHP 4: Compile CCVS support into PHP4. Please specify your CCVS base install directory as DIR.
PHP 3: Include Cybercash MCK support. DIR is the cybercash mck build directory, which defaults to /usr/src/mck-3.2.0.3-linux. For help, look in extra/cyberlib.
PHP 4: Option not available; use --with-cybercash instead.
PHP 3: Option not available; use --with-mck instead.
PHP 4: Include CyberCash support. DIR is the CyberCash MCK install directory.
PHP 3: Option not available in PHP 3
PHP 4: Include Verisign Payflow Pro support
PHP 3: Option not available in PHP 3
PHP 4: Include support for FreeType2 (experimental).
PHP 3: Include GD support (DIR is GD's install dir).
PHP 4: Include GD support (DIR is GD's install dir). Set DIR to shared to build as a dl, or shared,DIR to build as a dl and still specify DIR.
PHP 3, PHP 4: Disable GD support.
PHP 3: Include ImageMagick support. DIR is the install directory, and if left out, PHP will try to find it on its own. [experimental]
PHP 4: Option not available in PHP 4
PHP 3: jpeg dir for pdflib 2.0
PHP 4: jpeg dir for pdflib 3.x
PHP 3: Option not available in PHP 3
PHP 4: png dir for pdflib 3.x
PHP 3: Enable t1lib support.
PHP 4: Option not available; use --with-t1lib instead.
PHP 3: Option not available; use --enable-t1lib instead.
PHP 4: Include T1lib support.
PHP 3: tiff dir for pdflib 2.0
PHP 4: tiff dir for pdflib 3.x
PHP 3, PHP 4: Include FreeType support
PHP 3: Option not available in PHP 3
PHP 4: xpm dir for gd-1.8+
These are being classified over time, where appropriate.
PHP 3: Compile without BC arbitrary precision math functions. These functions allow you to operate with numbers outside of the ranges allowed by regular integers and floats; see BCMath Arbitrary Precision Mathematics Functions for more information.
PHP 4: Option not available; bcmath is not compiled in by default. Use --enable-bcmath to compile it in.
PHP 3: Compile without displaying source support
PHP 4: Option not available in PHP 4
PHP 3: Option not available in PHP 3
PHP 4: avoid locking (might break parallel builds)
PHP 3: Option not available in PHP 3
PHP 4: Do not install PEAR
PHP 3: Option not available in PHP 3
PHP 4: Disable PIC for shared objects
PHP 3: Option not available in PHP 3; use --without-posix instead.
PHP 4: Disable POSIX-like functions
PHP 3: Option not available in PHP 3
PHP 4: Disable passing additional runtime library search paths
PHP 3: Option not available in PHP 3
PHP 4: Disable session support
PHP 3: Option not available in PHP 3; bcmath is compiled in by default. Use --disable-bcmath to disable it.
PHP 4: Compile with bc style precision math functions. Read README-BCMATH for instructions on how to get this module installed. These functions allow you to operate with numbers outside of the ranges allowed by regular integers and floats; see BCMath Arbitrary Precision Mathematics Functions for more information.
PHP 3: Option not available in PHP 3
PHP 4: Enable C9x-inline semantics
PHP 3: Option not available in PHP 3
PHP 4: Enable support for calendar conversion
PHP 3, PHP 4: Compile with debugging symbols.
PHP 3: Compile with remote debugging functions
PHP 4: Option not available in PHP 4
PHP 3, PHP 4: If this is enabled, the PHP CGI binary can safely be placed outside of the web tree and people will not be able to circumvent .htaccess security.
PHP 3, PHP 4: Enable dmalloc
PHP 3: Option not available in PHP 3
PHP 4: Enable exif support
PHP 3: Option not available in PHP 3
PHP 4: This will most likely break your build
PHP 3: Option not available in PHP 3
PHP 4: optimize for fast installation [default=yes]
PHP 3, PHP 4: Enable the security check for internal server redirects. You should use this if you are running the CGI version with Apache.
PHP 3: Option not available in PHP 3
PHP 4: If you have much memory and are using gcc, you might try this.
PHP 3: Option not available in PHP 3
PHP 4: Enable explicitly linking against libgcc
PHP 3, PHP 4: enable make rules and dependencies not useful (and sometimes confusing) to the casual installer
PHP 3, PHP 4: Compile with memory limit support.
PHP 3, PHP 4: Enable safe mode by default.
PHP 3: Option not available in PHP 3
PHP 4: Enable CORBA support via Satellite (Requires ORBit)
PHP 3: Option not available in PHP 3
PHP 4: build shared libraries [default=yes]
PHP 3, PHP 4: Enable PHP's own SIGCHLD handler.
PHP 3: Option not available in PHP 3
PHP 4: build static libraries [default=yes]
PHP 3, PHP 4: Enable System V semaphore support.
PHP 3, PHP 4: Enable the System V shared memory support
PHP 3: Option not available in PHP 3
PHP 4: Enable transparent session id propagation
PHP 3, PHP 4: Include CDB support
PHP 3: Sets the path in which to look for php3.ini. Defaults to /usr/local/lib
PHP 4: Sets the path in which to look for php.ini. Defaults to /usr/local/lib
PHP 3: Include ClibPDF support. DIR is the ClibPDF install directory, defaults to /usr/local.
PHP 4: Include cpdflib support (requires cpdflib >= 2). DIR is the cpdfllib install directory, defaults to /usr.
PHP 3: Option not available in PHP 3
PHP 4: Include Easysoft OOB support. DIR is the OOB base install directory, defaults to /usr/local/easysoft/oob/client.
PHP 3, PHP 4: Only allow executables in DIR when in safe mode defaults to /usr/local/php/bin
PHP 3, PHP 4: Include fdftk support. DIR is the fdftk install directory, defaults to /usr/local.
PHP 3: Option not available in PHP 3
PHP 4: assume the C compiler uses GNU ld [default=no]
PHP 3: Option not available in PHP 3
PHP 4: Include ICAP support.
PHP 3, PHP 4: Include IMAP support. DIR is the IMAP include and c-client.a directory.
PHP 3: Include IMSP support (DIR is IMSP's include dir and libimsp.a dir).
PHP 4: Option not available in PHP 4
PHP 3: Option not available in PHP 3
PHP 4: Include Java support. DIR is the base install directory for the JDK. This extension can only be built as a shared dl.
PHP 3: Option not available in PHP 3
PHP 4: Include Kerberos support in IMAP.
PHP 3, PHP 4: Include MCAL support.
PHP 3, PHP 4: Include mcrypt support. DIR is the mcrypt install directory.
PHP 3, PHP 4: Include mhash support. DIR is the mhash install directory.
PHP 3: Option not available in PHP 3
PHP 4: Include mm support for session storage
PHP 3, PHP 4: Enable transfer tables for mod_charset (Rus Apache).
PHP 3: Include pdflib support (tested with 0.6 and 2.0). DIR is the pdflib install directory, which defaults to /usr/local.
PHP 4: Include pdflib 3.x support. DIR is the pdflib install directory, which defaults to /usr/local.
PHP 3: Option not available in PHP 3
PHP 4: Include readline support. DIR is the readline install directory.
PHP 3: Option not available in PHP 3
PHP 4: regex library type: system, apache, php
PHP 3: Option not available in PHP 3
PHP 4: Include servlet support. DIR is the base install directory for the JSDK. This SAPI requires that the Java extension be built as a shared dl.
PHP 3: Option not available in PHP 3
PHP 4: Include swf support
PHP 3: Do not use the bundled regex library
PHP 4: (deprecated) Use system regex library
PHP 3: Option not available in PHP 3
PHP 4: Use GNU Pth.
PHP 3: Option not available in PHP 3
PHP 4: Use POSIX threads (default)
PHP 3: use the X Window System
PHP 4: Option not available in PHP 4
PHP 3: zlib dir for pdflib 2.0 or include zlib support
PHP 4: zlib dir for pdflib 3.x or include zlib support
PHP 3, PHP 4: Include zlib support (requires zlib >= 1.0.9). DIR is the zlib install directory, defaults to /usr.
PHP 3: Don't include Perl Compatible Regular Expressions support
PHP 4: Do not include Perl Compatible Regular Expressions support. Use --with-pcre-regex=DIR to specify DIR where PCRE's include and library files are located, if not using bundled library.
PHP 3: Don't include POSIX functions
PHP 4: Option not available in PHP 4; use --disable-posix instead.
PHP 3: Option not available in PHP 3
PHP 4: Include CURL support
PHP 3: Option not available; use --with-ftp instead.
PHP 4: Enable FTP support
PHP 3: Include FTP support.
PHP 4: Option not available; use --enable-ftp instead
PHP 3, PHP 4: Disable the URL-aware fopen wrapper that allows accessing files via http or ftp.
PHP 3, PHP 4: Include DAV support through Apache's mod_dav, DIR is mod_dav's installation directory (Apache module version only!)
PHP 3, PHP 4: Include OpenSSL support in SNMP.
PHP 3, PHP 4: Include SNMP support. DIR is the SNMP base install directory, defaults to searching through a number of common locations for the snmp install. Set DIR to shared to build as a dl, or shared,DIR to build as a dl and still specify DIR.
PHP 3, PHP 4: Enable UCD SNMP hack
PHP 3: Option not available in PHP 3
PHP 4: Enable sockets support
PHP 3: Option not available in PHP 3
PHP 4: Include YAZ support (ANSI/NISO Z39.50). DIR is the YAZ bin install directory
PHP 3: Option not available; use --with-yp instead.
PHP 4: Include YP support
PHP 3: Include YP support
PHP 4: Option not available; use --enable-yp instead.
PHP 3, PHP 4: Enable magic quotes by default.
PHP 3, PHP 4: Disable the short-form <? start tag by default.
PHP 3: Enable GET/POST/Cookie track variables by default.
PHP 4: Option not available in PHP 4; as of PHP 4.0.2, track_vars is always on.
PHP 3: Option not available in PHP 3
PHP 4: Specify path to the source distribution of AOLserver
PHP 3: Option not available in PHP 3
PHP 4: Specify path to the installed AOLserver
PHP 3, PHP 4: Build Apache module. DIR is the top-level Apache build directory, defaults to /usr/local/etc/httpd.
PHP 3, PHP 4: Build shared Apache module. FILE is the optional pathname to the Apache apxs tool; defaults to apxs.
PHP 3: Take advantage of versioning and scoping Provided by Solaris 2.x and Linux
PHP 4: Export only required symbols. See INSTALL for more information
PHP 3, PHP 4: Build fhttpd module. DIR is the fhttpd sources directory, defaults to /usr/local/src/fhttpd.
PHP 3: Option not available in PHP 3
PHP 4: Specify path to the installed Netscape
PHP 3: Option not available in PHP 3
PHP 4:
PHP 3: Option not available in PHP 3
PHP 4: Build PHP as a module for use with Pi3Web.
PHP 3: Option not available in PHP 3
PHP 4: Build PHP as a Pike module. DIR is the base Roxen directory, normally /usr/local/roxen/server.
PHP 3: Option not available in PHP 3
PHP 4: Build the Roxen module using Zend Thread Safety.
PHP 3: Option not available in PHP 3
PHP 4:
PHP 3: Option not available in PHP 3
PHP 4: Build PHP as an ISAPI module for use with Zeus.
PHP 3, PHP 4: Include ASPELL support.
PHP 3, PHP 4: Include GNU gettext support. DIR is the gettext install directory, defaults to /usr/local
PHP 3: Option not available in PHP 3
PHP 4: Include PSPELL support.
PHP 3: Include GNU recode support.
PHP 4: Include recode support. DIR is the recode install directory.
PHP 3: Option not available in PHP 3
PHP 4: Include DOM support (requires libxml >= 2.0). DIR is the libxml install directory, defaults to /usr
PHP 3: Option not available in PHP 3
PHP 4: Enable Descriptive errors
PHP 3: Option not available in PHP 3
PHP 4: Include Sablotron support
PHP 3: Option not available in PHP 3
PHP 4: Enable WDDX support
PHP 3: Option not available in PHP 3; XML functionality is not built in by default. Use --with-xml to turn it on.
PHP 4: Disable XML support using bundled expat lib
PHP 3: Include XML support
PHP 4: Option not available; XML support is built in by default. Use --disable-xml to turn it off.