3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a1 = array('foo','bar'); $a2 = array('bar', 'baz'); echo json_encode(array_merge($a1, $a2));
Output for 5.2.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
["foo","bar","bar","baz"]
Output for 5.0.0 - 5.1.6
Fatal error: Call to undefined function json_encode() in /in/kshbl on line 4
Process exited with code 255.
Output for 4.4.5 - 4.4.9
Fatal error: Call to undefined function: json_encode() in /in/kshbl on line 4
Process exited with code 255.
Output for 4.3.2 - 4.4.4
Fatal error: Call to undefined function: json_encode() in /in/kshbl on line 4
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: json_encode() in /in/kshbl on line 4