3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $array = range(0, 500000); $ref =& $array; var_dump(count($array));
based on cotAT
Output for 7.0.0 - 7.2.0
int(500001)
Output for 5.3.18 - 5.6.28
Fatal error: Allowed memory size of 67108864 bytes exhausted (tried to allocate 32 bytes) in /in/krtZj on line 3
Process exited with code 255.