3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php echo json_encode(array('w'=>'q'));
Output for 5.2.0 - 7.1.0
{"w":"q"}
Output for 5.0.0 - 5.1.6
Fatal error: Call to undefined function json_encode() in /in/4vaBE on line 3
Process exited with code 255.
Output for 4.4.5 - 4.4.9
Fatal error: Call to undefined function: json_encode() in /in/4vaBE on line 3
Process exited with code 255.
Output for 4.3.2 - 4.4.4
Fatal error: Call to undefined function: json_encode() in /in/4vaBE on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: json_encode() in /in/4vaBE on line 3