3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $arr = array('1', '2', '3'); foreach ($arr as $key=>&$val) { $arr[3] = '999'; echo ($val+1)."\n"; }
Output for 5.2.2 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
2 3 4 1000
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.0.0 - 5.2.1
2 3 4
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected '&', expecting T_VARIABLE or '$' in /in/lhONp on line 4
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected '&', expecting T_VARIABLE or '$' in /in/lhONp on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_VARIABLE' or `'$'' in /in/lhONp on line 4
Process exited with code 255.