3v4l.org

run code in 300+ PHP versions simultaneously
<?php $mem = memory_get_usage(); $a = array_fill( 0, 131072, 0 ); $mema = memory_get_usage() - $mem; $b = 1 ? $a : 0; $memb = memory_get_usage() - $mem; printf( '%1.1f', $memb / $mema );

preferences:
36.14 ms | 402 KiB | 5 Q