What is PHP track_errors?

I was just glancing through my Cpanel's php.ini EZConfig (basically php.ini; it just allows me to change some settings in php.ini through Cpanel) and noticed track_errors.

Can someone tell me what this means, I have searched the php website and Google an开发者_如何学Pythond cannot find out what it means exactly?

Search for "track_errors PHP".

http://us3.php.net/manual/en/errorfunc.configuration.php#ini.track-errors

If enabled, the last error message will always be present in the variable $php_errormsg.