Testing PHP's Zend Memory Manager

ZendMMTest.php

<?php

/**
 * Testing Zend Memory Manager.
 * 
 * Testing allocated segments in Kilobytes
 */

$m = (float) (memory_get_usage(true) / 1024);

echo "[0] Memory usage: " . $m . " Kb" . PHP_EOL;

$mem = range(1, 1024 * 1024);

$m = (float) (memory_get_usage(true) / 1024);

echo "[1] Memory usage: " . $m . " Kb" . PHP_EOL;

unset($mem);

$m = (float) (memory_get_usage(true) / 1024);

echo "[2] Memory usage: " . $m . " Kb" . PHP_EOL;

Output:

[0] Memory usage: 2048kB
[1] Memory usage: 28672kB
[2] Memory usage: 2048kB