How do I include a php.ini file in another php.ini file?

The .ini files from the main php,ini file can’t be included. Instead, while compiling PHP, the line

--with-config-file-scan-dir=PATH                                                

can be added.

The ‘PATH’ in the above line refers to the location where the configuration file is to be scanned.

During compile time, PHP will look for each and every .ini file in that specific directory, apart from searching in the normal php.ini file.