__FILE__ and __LINE__ in functions

Is it possible to get the file and line number a user-defined function was called from? Something similar to caller() in Perl. Here's an example: function error_func ($message = '') { echo "Error occurred at ", /* LINE NUMBER */, " in ", /* FILE NAME */, " on ", date ("n/j/y h:i:s"), ": $message"; } __LINE__ and __FILE__ only return the line and file the function is contained in, and the PHP manual doesn't seem to make mention of this, and error_log() doesn't do line/file reporting. Is it at all possible in PHP or am I stuck? If I am, where can I make a request for such a feature to be implemented in a future version of PHP? Any help/comments/suggestions would be appreciated. -- Eden Li eden@adv-computer.com