Editing the Php.ini file?

[Glendon]

Greetings,

I need to edit the php.ini file so that it has a value on the "upload_tmp_dir" option. The value i want is "/tmp". I cannot find any information on editing the file and its not located in any of the folders on my web server. Any idea's on where i can find the file?

[Skunkboy]

custom php.ini information is here (http://resources.powweb.com/support/tutorials/index.php?category=PHP/MySQL&topic_id=57).

[Glendon]

Thank you :)