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Apache 2.0 on Unix systems

This section contains notes and hints specific to Apache 2.0 installs of PHP on Unix systems.


We do not recommend using a threaded MPM in production with Apache2. Use the prefork MPM instead, or use Apache1. For information on why, read the related FAQ entry on using Apache2 with a threaded MPM

You are highly encouraged to take a look at the » Apache Documentation to get a basic understanding of the Apache 2.0 Server.

PHP and Apache 2.0.x compatibility notes:

The following versions of PHP are known to work with the most recent version of Apache 2.0.x:

These versions of PHP are compatible to Apache 2.0.40 and later.

Apache 2.0 SAPI-support started with PHP 4.2.0. PHP 4.2.3 works with Apache 2.0.39, don't use any other version of Apache with PHP 4.2.3. However, the recommended setup is to use PHP 4.3.0 or later with the most recent version of Apache2.

All mentioned versions of PHP will work still with Apache 1.3.x.

Download the most recent version of » Apache 2.0 and a fitting PHP version from the above mentioned places. This quick guide covers only the basics to get started with Apache 2.0 and PHP. For more information read the » Apache Documentation. The version numbers have been omitted here, to ensure the instructions are not incorrect. You will need to replace the 'NN' here with the correct values from your files.

Example 2.4.  Installation Instructions (Apache 2 Shared Module Version)

1.  gzip -d httpd-2_0_NN.tar.gz
2.  tar xvf httpd-2_0_NN.tar
3.  gunzip php-NN.tar.gz
4.  tar -xvf php-NN.tar
5.  cd httpd-2_0_NN
6.  ./configure --enable-so
7.  make
8.  make install

   Now you have Apache 2.0.NN available under /usr/local/apache2,
   configured with loadable module support and the standard MPM prefork.
   To test the installation use your normal procedure for starting
   the Apache server, e.g.:
   /usr/local/apache2/bin/apachectl start
   and stop the server to go on with the configuration for PHP:
   /usr/local/apache2/bin/apachectl stop.

9.  cd ../php-NN

10. Now, configure your PHP.  This is where you customize your PHP
   with various options, like which extensions will be enabled.  Do a
   ./configure --help for a list of available options.  In our example
   we'll do a simple configure with Apache 2 and MySQL support.  Your
   path to apxs may differ, in fact, the binary may even be named apxs2 on
   your system.
     ./configure --with-apxs2=/usr/local/apache2/bin/apxs --with-mysql

11. make
12. make install

   If you decide to change your configure options after installation,
   you only need to repeat the last three steps. You only need to
   restart apache for the new module to take effect. A recompile of
   Apache is not needed.
   Note that unless told otherwise, 'make install' will also install PEAR,
   various PHP tools such as phpize, install the PHP CLI, and more.
13. Setup your php.ini
   cp php.ini-dist /usr/local/lib/php.ini
   You may edit your .ini file to set PHP options.  If you prefer having
   php.ini in another location, use --with-config-file-path=/some/path in
   step 10.
   If you instead choose php.ini-recommended, be certain to read the list
   of changes within, as they affect how PHP behaves.

14. Edit your httpd.conf to load the PHP module.  The path on the right hand
   side of the LoadModule statement must point to the path of the PHP
   module on your system.  The make install from above may have already
   added this for you, but be sure to check.

   For PHP 4:
     LoadModule php4_module modules/
   For PHP 5:
     LoadModule php5_module modules/

15. Tell Apache to parse certain extensions as PHP.  For example,
   let's have Apache parse the .php extension as PHP.  You could
   have any extension(s) parse as PHP by simply adding more, with
   each separated by a space.  We'll add .phtml to demonstrate.
     AddType application/x-httpd-php .php .phtml
   It's also common to setup the .phps extension to show highlighted PHP
   source, this can be done with:
     AddType application/x-httpd-php-source .phps

16. Use your normal procedure for starting the Apache server, e.g.:
     /usr/local/apache2/bin/apachectl start

Following the steps above you will have a running Apache 2.0 with support for PHP as SAPI module. Of course there are many more configuration options available for both, Apache and PHP. For more information use ./configure --help in the corresponding source tree. In case you wish to build a multithreaded version of Apache 2.0 you must overwrite the standard MPM-Module prefork either with worker or perchild. To do so append to your configure line in step 6 above either the option --with-mpm=worker or --with-mpm=perchild. Take care about the consequences and understand what you are doing. For more information read the Apache documentation about the » MPM-Modules.


If you want to use content negotiation, read the Apache MultiViews FAQ.


To build a multithreaded version of Apache your system must support threads. This also implies to build PHP with experimental Zend Thread Safety (ZTS). Therefore not all extensions might be available. The recommended setup is to build Apache with the standard prefork MPM-Module.