3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = array(); for ($i=0; $i<100000; $i++) $a[] = $i; $a = implode(',', $a); // or $a = json_encode($a); echo number_format(memory_get_usage(true)/1048576, 2)."\n";

preferences:
29.74 ms | 402 KiB | 5 Q