- microtime: documentation ( source)
- number_format: documentation ( source)
<?php
$count = 50000;
$time = microtime(true);
$items = array();
for ($i = 0; $i < $count; $i++) {
$items[] = array();
}
$spentTime = microtime(true) - $time;
echo number_format($spentTime, 3) . ' seconds';