3v4l.org

run code in 300+ PHP versions simultaneously
<?php error_reporting(-1); $a = array(); $a['parent'] = array(['child'] => array()); if (!isset($a['parent']['child']['grandchild']) { $a['parent']['child']['grandchild'] = 'foo'; } var_dump($x);
Output for 5.4.0 - 5.4.25
Parse error: syntax error, unexpected '{' in /in/754oG on line 7
Process exited with code 255.
Output for 5.3.0 - 5.3.28
Parse error: syntax error, unexpected '[', expecting ')' in /in/754oG on line 4
Process exited with code 255.
preferences:
197.66 ms | 1395 KiB | 62 Q