<?php

for ($i=1; $i<100; $i++) {
	$a = loadmem($i); 
	echo "You have allocated ". $i . "M (". memory_get_usage() . ") memory in this php script" . "<br />";
	unset($a);
}

function loadmem($howmuchmeg) {
	$a = str_repeat("0", $howmuchmeg * 1024 * 1024); // alocating 1 Mchars	
	return $a;
}

?> 