Your php.ini file is the core configuration file for PHP on your server. Usually the default settings work fine, but there are some tweaks that may improve your performance. Here are a couple of pointers to working with your php.ini file.
Working with php.ini
1) Changes you make to the php.ini file do not become effective until you reboot apache. If you dont' know how to reboot apache, you can use a program like putty to ssh into your server and use a command line apache reboot like: apachectl restart
2) There are two types of php settings 'LOCAL' and 'GLOBAL'. You may make changes to the php.ini file only to realize that within a specific program, the setting is not the same. That's because the script you are using is setting it's own 'LOCAL' setting which is overriding the php.ini 'GLOBAL' setting. When there is not a LOCAL setting, the GLOBAL setting will take precedence.
3) If you don't have access to your php.ini file, you can make most changes on a per directory basis by using a .htaccess file. Your server reads the .htaccess file to apply any configuration settings you might want to include on a per directory basis.
