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A PHP extension comes in the form of a file with an
.so extension. To load it, you need to add to your
php.ini file (Environment > PHP or at the website level in Web > Sites). Here’s and example for YAML extension:
extension = /home/[username]/yaml.so
/home/[username]/yaml.so is the absolute path to your extension.
Some extensions load with the
zend_extension directive and not extension. The extension publisher will tell you when this directive should be used instead.
The extensions depend on the major version of PHP. In other words, a
.so file compiled for PHP version 5.5 will not work with version 5.6: it must be recompiled.
The following sections tell you how to get new extensions.
PHP includes numerous extensions as standard, a number of which are already preloaded by default by alwaysdata. To see the full list of extensions available:
$ ls $(php-config --extension-dir)
To see the list of extensions already loaded in your account:
$ grep extension $HOME/admin/config/php/php.ini
To load an extension included in PHP, you will not need to specify the full directory, the filename is enough. For example:
extension = bcmath.so
Many extensions can be installed via PECL. To install an extension, we suggest using our proprietary script,
ad_install_pecl. It handles downloading, configuring and compiling an extension:
$ ad_install_pecl yaml
The command generates a new
.so file in the current directory. You don’t have to use our script, you can use the usual commands (
make) if you prefer.
When changing of PHP version, it is necessary to reinstall them.
Some extensions can be directly downloaded from the vendor site in pre-compiled form (
.so file). If the vendor offers you a choice, download the Linux 64 bit version. For example:
Some extensions are complex or even impossibles to compile manually. It is possible to retrieve a
.so file from the Linux distribution packs, for example Debian:
$ wget http://ftp.debian.org/debian/pool/main/m/mapserver/php5-mapscript_7.0.4-1~bpo8+1_amd64.deb $ dpkg-deb -x php5-mapscript_7.0.4-1~bpo8+1_amd64.deb .