3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = gmp_init(42); $b = gmp_init(17); // Pre-5.6 code: var_dump(gmp_add($a, $b)); var_dump(gmp_add($a, 17)); var_dump(gmp_add(42, $b));

preferences:
69.89 ms | 402 KiB | 5 Q