Simple PHP script for logging page load times. Will create a text file named "loadtimes.txt" in the working directory. Only use this for testing.

loadtimes.php

<?php

$starttime = microtime(true);


// PAGE CODE GOES HERE


try{
	$endtime = microtime(true);
	$duration = $endtime - $starttime;

	$date = new DateTime();
	$timestamp = $date->format('Y-m-d H:i:s.u');
	$entry = sprintf("[%s] %.5f seconds for %s\n", $timestamp,  $duration, $_SERVER['REQUEST_URI']);
	$handle = fopen('loadtimes.txt', 'a');

	if(flock($handle, LOCK_EX)){
		fwrite($handle, $entry);
		fflush($handle);
		flock($handle, LOCK_UN);
	}

	fclose($handle);
}catch(Exception $e){}

?>