3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $i =0; while(true) { $a = &$a[]; $i++; if ($i % 100==0){ echo $i,' ', var_dump($a); break;}; }
based on 2j2Rp
Output for 4.3.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
100 NULL
Output for hhvm-3.10.0

Process exited with code 153.