3v4l.org

run code in 300+ PHP versions simultaneously
<?php $max = 100; $arr = array_fill(0, $max, 1); //$mem = memory_get_usage(true); foreach ($arr as $key=>$val) { $arr[$max+1] = 9999; } echo memory_get_usage();

preferences:
32.65 ms | 402 KiB | 5 Q