3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $c = " total used free shared buffers cached\nMem: 494 383 111 0 29 200\n-/+ buffers/cache: 153 341\nSwap: 255 0 255"; preg_match("/Mem:\s+(?P<total>\d+)/", $c ,$r); print_r($r);
Output for 4.3.3 - 7.2.0
Array ( [0] => Mem: 494 [total] => 494 [1] => 494 )
Output for 4.3.0 - 4.3.2
Array ( [0] => Mem: 494 [1] => 494 )