array_walk( debug_backtrace(),
                function($a) {
                    print "<br /><b>".  basename($a['file'])
                        . "</b> &nbsp; <font color=\"red\">" . $a['line'] . "</font> &nbsp; <font color=\"green\">"
                        . $a['function'] ."() </font> &nbsp; -- ".dirname($a['file'])."/";
                });