memory_limit = 24M

A complete list of php.ini directives can be found here:-

http://www.php.net/manual/en/ini.list.php

-: you should only set these as per the requirements of your application as other settings may cause your scripts to malfunction or be vulnerable to attack.

If you are running PHP5, you should name this file php5.ini, for PHP4 it should be php.ini . Unless otherwise required, these should be located in the root of your hosting package (ie, above public_html).

php.ini files can be used for very fine-grained control – a PHP script will pick up the settings in the php.ini file closest to it, so you can enable functions for a single folder rather than the whole site – this is useful when running CMSes on subdomains.