Where does PHP store the error log? (PHP 5, Apache, FastCGI, and cPanel)

I am on shared hosting and have cPanel, Apache, and PHP is run by FastCGI. Where does PHP store the error log?

Is there another way I can find the error log on a shared hosting environment instead of having to go through entire site structure to look for error_log files?

I have access to the php.ini file (I am using PHP version 5.2.16).