PHP : A simple function to display the current memory usage

memory_usage.php

<?php
// @see http://fr2.php.net/manual/en/function.mb-convert-encoding.php#103300
function memory_usage() {
	$mem_usage = memory_get_usage(true);
	if ($mem_usage < 1024) {
		$mem_usage .= ' bytes';
	} elseif ($mem_usage < 1048576) {
		$mem_usage = round($mem_usage/1024,2) . ' kilobytes';
	} else {
		$mem_usage = round($mem_usage/1048576,2) . ' megabytes';
	}
	return $mem_usage;
}
?>