Test PHPs memory limit

test-memory-limit.php

<pre>
<?php
$megabyte = 1528; // define the max megabytes which should be tested
 
function tryAlloc($megabyte){
    echo "try allocating {$megabyte} megabyte...";
    $mb = $megabyte;
    $dummy = str_repeat("-",1048576*$mb);
    echo "pass.";
    echo "Usage: " . memory_get_usage(true)/1048576;
    echo " Peak: " . memory_get_peak_usage(true)/1048576;
    echo "\n";
}
for($i=8;$i<=$megabyte;$i+=8){
    $limit = $i.'M';
    ini_set('memory_limit', $limit);
    echo "set memory_limit to {$limit}\n";
    echo "memory limit is ". ini_get("memory_limit")."\n";
    tryAlloc($i-1);
}
 
?>
</pre>