3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $outer=array(); $outer[7]=array('a'=>'aaa','b'=>array()); $inner7=&$outer[7]; $inner['b'][]='xxx'; $inner['b'][]='yyy'; print_r($inner); print_r($outer);
Output for 4.3.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
Array ( [b] => Array ( [0] => xxx [1] => yyy ) ) Array ( [7] => Array ( [a] => aaa [b] => Array ( ) ) )
Output for hhvm-3.10.0

Process exited with code 153.