3v4l.org

run code in 300+ PHP versions simultaneously
<?php $foo = new StdClass; $bar = 'a'; $foo->$bar = [ 'baz' => 'bang' ]; echo $foo->$bar['baz'];
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
bang
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.38
Warning: Illegal string offset 'baz' in /in/0QneW on line 12 Notice: Array to string conversion in /in/0QneW on line 12 Array

preferences:
241.88 ms | 402 KiB | 289 Q