<?php require_once("_head.php"); mkheader("functions!", "#fafafa"); ?> <body> <!-- ======================================================= --> <pre><?php function sum($this, $other=5) { return $this + $other; } print "I am human, I am.\n"; $a = $_GET['a'] ? $_GET['a'] : 72 ; print "$a plus 5 is " . sum($a, 5) . ".\n"; print "$a plus 5 is " . sum($a) . ".\n"; ?></pre> </body> </html>