3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = [[1,2],'3']; foreach($a as $k => $b) { $a[$k][] = 3; } print_r($a);
Output for 7.0.0 - 7.3.1
Fatal error: Uncaught Error: [] operator not supported for strings in /in/M9amL:4 Stack trace: #0 {main} thrown in /in/M9amL on line 4
Process exited with code 255.
Output for 5.4.2 - 5.6.28
Fatal error: [] operator not supported for strings in /in/M9amL on line 4
Process exited with code 255.
Output for 5.3.18 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/M9amL on line 2
Process exited with code 255.