How to check if memcache or memcached is installed for PHP?

Question

How do I test if memcache or memcached (for PHP) is installed on my Apache webserver?

Memcache is a caching daemon designed especiall

Answer 1

The best approach in this case is to use extension_loaded() or function_exists() they are equally as fast.

You can see evidence here:

https://github.com/dragoonis/ppi-framework/blob/master/Cache/Memcached.php#L140

Bear in mind that some PHP extensions such as APC have php.ini settings that can disable them even though the extension may be loaded. Here is an example of how to check against that also:

https://github.com/dragoonis/ppi-framework/blob/master/Cache/Apc.php#L79

Hope this helps.