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Chapter 3. Installation of PECL extensions

Introduction to PECL Installations

   PECL is a repository of PHP extensions that are made available to you
   via the PEAR packaging system. This section of the manual is intended
   to demonstrate how to obtain and install PECL extensions.

   These instructions assume /your/phpsrcdir/ is the path to the PHP
   source distribution, and that extname is the name of the PECL
   extension. Adjust accordingly. These instructions also assume a
   familiarity with the pear command. The information in the PEAR manual
   for the pear command also applies to the pecl command.

   To be useful, a shared extension must be built, installed, and loaded.
   The methods described below provide you with various instructions on
   how to build and install the extensions, but they do not automatically
   load them. Extensions can be loaded by adding an extension directive.
   To this php.ini file, or through the use of the dl() function.

   When building PHP modules, it's important to have known-good versions
   of the required tools (autoconf, automake, libtool, etc.) See the
   SVN Instructions for details on the required tools, and required
   versions.
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Downloading PECL extensions

   There are several options for downloading PECL extensions, such as:

     * http://pecl.php.net
       The PECL web site contains information about the different
       extensions that are offered by the PHP Development Team. The
       information available here includes: ChangeLog, release notes,
       requirements and other similar details.
     * pecl download extname
       PECL extensions that have releases listed on the PECL web site are
       available for download and installation using the pecl command.
       Specific revisions may also be specified.
     * SVN
       Most PECL extensions also reside in SVN. A web-based view may be
       seen at http://svn.php.net/pecl/. To download straight from SVN,
       the following sequence of commands may be used.

$ svn  co http://svn.php.net/repository/pecl/<extname>/trunk

     * Windows downloads
       Windows users may find compiled PECL binaries by downloading the
       Collection of PECL modules from the PHP Downloads page, or by
       retrieving a PECL Snapshot or an extension DLL on PECL4WIN. To
       compile PHP under Windows, read the appropriate chapter.
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PECL for Windows users

   As with any other PHP extension DLL, installation is as simple as
   copying the PECL extension DLLs into the extension_dir folder and
   loading them from php.ini. For example, add the following line to your
   php.ini:

   extension=php_extname.dll

   After doing this, restart the web server.
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Compiling shared PECL extensions with the pecl command

   PECL makes it easy to create shared PHP extensions. Using the pecl
   command, do the following:

   $ pecl install extname

   This will download the source for extname, compile, and install
   extname.so into your extension_dir. extname.so may then be loaded via
   php.ini

   By default, the pecl command will not install packages that are marked
   with the alpha or beta state. If no stable packages are available, you
   may install a beta package using the following command:

   $ pecl install extname-beta

   You may also install a specific version using this variant:

   $ pecl install extname-0.1
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Compiling shared PECL extensions with phpize

   Sometimes, using the pecl installer is not an option. This could be
   because you're behind a firewall, or it could be because the extension
   you want to install is not available as a PECL compatible package, such
   as unreleased extensions from SVN. If you need to build such an
   extension, you can use the lower-level build tools to perform the build
   manually.

   The phpize command is used to prepare the build environment for a PHP
   extension. In the following sample, the sources for an extension are in
   a directory named extname:

$ cd extname
$ phpize
$ ./configure
$ make
# make install

   A successful install will have created extname.so and put it into the
   PHP extensions directory. You'll need to and adjust php.ini and add an
   extension=extname.so line before you can use the extension.

   If the system is missing the phpize command, and precompiled packages
   (like RPM's) are used, be sure to also install the appropriate devel
   version of the PHP package as they often include the phpize command
   along with the appropriate header files to build PHP and its
   extensions.

   Execute phpize --help to display additional usage information.
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Compiling PECL extensions statically into PHP

   You might find that you need to build a PECL extension statically into
   your PHP binary. To do this, you'll need to place the extension source
   under the php-src/ext/ directory and tell the PHP build system to
   regenerate its configure script.

$ cd /your/phpsrcdir/ext
$ pecl download extname
$ gzip -d < extname.tgz | tar -xvf -
$ mv extname-x.x.x extname

   This will result in the following directory:

   /your/phpsrcdir/ext/extname

   From here, force PHP to rebuild the configure script, and then build
   PHP as normal:

$ cd /your/phpsrcdir
$ rm configure
$ ./buildconf --force
$ ./configure --help
$ ./configure --with-extname --enable-someotherext --with-foobar
$ make
$ make install

     Note: To run the 'buildconf' script you need autoconf 2.13 and
     automake 1.4+ (newer versions of autoconf may work, but are not
     supported).

   Whether --enable-extname or --with-extname is used depends on the
   extension. Typically an extension that does not require external
   libraries uses --enable. To be sure, run the following after buildconf:

   $ ./configure --help | grep extname