3v4l.org

run code in 300+ PHP versions simultaneously
<?php print json_encode(array()) . PHP_EOL; print json_encode(array(array('noneke' => 'vlue')));
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.5 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
[] [{"noneke":"vlue"}]
preferences:
200.51 ms | 404 KiB | 266 Q