3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $SESSION = []; function a($name) { global $SESSION; $SESSION[$name] = $$name; } a('a'); $a = 'abc'; var_dump($SESSION);
based on 9DdjK
Output for 5.4.0 - 7.2.0
Notice: Undefined variable: a in /in/HOuV6 on line 8 array(1) { ["a"]=> NULL }
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/HOuV6 on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/HOuV6 on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/HOuV6 on line 3
Process exited with code 255.