3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $arr= array(1=>array(1,2),3=>array('name'=>500)); echo $json=json_encode($arr);echo gettype($json);
Output for 5.2.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
{"1":[1,2],"3":{"name":500}}string
Output for 5.0.0 - 5.1.6
Fatal error: Call to undefined function json_encode() in /in/8DUvs on line 7
Process exited with code 255.
Output for 4.4.5 - 4.4.9
Fatal error: Call to undefined function: json_encode() in /in/8DUvs on line 7
Process exited with code 255.
Output for 4.3.2 - 4.4.4
Fatal error: Call to undefined function: json_encode() in /in/8DUvs on line 7
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: json_encode() in /in/8DUvs on line 7