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

Question

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

Answer 1

I installed memcached for php and wasn't sure how to make sure that its ini was included in my php.ini, but as it turns out it automatically is. You can validate what is being loaded by running php --ini.

php --ini
Configuration File (php.ini) Path: /opt/local/etc/php5
Loaded Configuration File:         (none)
Scan for additional .ini files in: /opt/local/var/db/php5
Additional .ini files parsed:      /opt/local/var/db/php5/memcached.ini