How do I get PHP support for mysql, sqlite, sockets, etc
In some cases, such as packages or advanced Captive Portal code, additional PHP extensions may be required that are not enabled.
There are several PHP extensions that are included in the pfSense binary distribution on pfSense 2.2 and before, but are left disabled by default to conserve resources since they are not required by the base system. These disabled modules may be activated using the "dynamodules" system.
The extensions included and activated vary by pfSense version, look in /usr/local/lib/php/ to see which extensions are present, and check the output of php -m to see what is enabled on a firewall already.
Examples of extensions that are included but not activated may include:
bz2 mysql pdo_sqlite sockets sysvmsg sysvsem sysvshm tokenizer xdebug
To activate one of these, create a file named for the extension in the /etc/dynamodules directory, and then trigger a rewrite of the php.ini file.
Activate the mysql.so module:
$ touch /etc/php_dynamodules/mysql $ /etc/rc.php_ini_setup $ php -m | grep mysql mysql
A reload of the WebGUI process may also be required. Use option 11 from the console/ssh menu. On pfSense 2.2 and later, also use option 16 to restart PHP-FPM. A reboot would also fully activate the module, but should not be necessary.
If a module is needed that is not included nor activated, a copy of the module may be obtained from an equivalent version FreeBSD system using a matching PHP version. Drop it into the correct lib directory, and activate it with dynamodules. This is a lot riskier, and may be prone to break in various ways, thus is it not supported nor recommended.
Installing Additional Modules on pfSense 2.3
Due to the modular nature of pfSense 2.3 using pkg, the extra modules that were included in the base system before are no longer there by default. They may be easily added using pkg install.
For example, to install the mysqli extension, use:
pkg install php56-mysqli
If the package name is not known, use search to find it:
pkg search mysql