PHP - filename calls function on different script, get filename from script containing function

Question

fileA.php: requires function.inc.php and uses x() from that include file

fileB.php: requires fileA.php User invokes fileB.php to get fileA.php

function.inc.php: function x() - returns filename that invoked it

What is the PHP server variable or whatever that gets the name of fileA.php from within function.inc.php?

• Usecase - function x() could be a mysql_query() or die(mail( {info about error as well as which file caused it} )

based on answer below - this works:

function x($q){ mysql_query($q) or die(mail('[email protected],'error @ '.$_SERVER['PHP_SELF'] , serialize(debug_backtrace()) . "\n\n".mysql_error())); }

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• for the person who voted this down - could you provide a better idea/solution for the function trace above?

Answer 1

As far as I know there isn't one. You could traverse the output of debug_backtrace to find it.