Here's my header:
function microtime_float() {
list($usec, $sec) = explode(" ", microtime());
return ((float)$usec + (float)$sec);
}
$startexecution=microtime_float();
And the footer:
$endexecution=microtime_float();
$timer=$endexecution-$startexecution;
?>
© 2003-<?=date("Y"); ?> Mycompany.com All rights reserved.
Page rendered in <?=$timer ?> seconds.
I believe that it's basically just implemented from the manual, as Installer suggests...