3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = [3 => '4', '8' => 5, 'AAA' => 'www']; echo json_encode($a);
Output for 5.4.0 - 7.1.0
{"3":"4","8":5,"AAA":"www"}
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/WXLBd on line 2
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/WXLBd on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/WXLBd on line 2
Process exited with code 255.