3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = array(); $a[1] = 'toto'; $m = memory_get_usage(); $a[2] = 'titi'; $m2 = memory_get_usage(); $a[1000000] = 'tata'; echo $m2-$m . ' '. memory_get_usage() - $m;

preferences:
29.74 ms | 402 KiB | 5 Q