3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
l<?php var_dump(json_encode(null));
Output for 5.2.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
lstring(4) "null"
Output for 5.0.0 - 5.1.6
l Fatal error: Call to undefined function json_encode() in /in/ApUQ7 on line 3
Process exited with code 255.
Output for 4.4.5 - 4.4.9
l Fatal error: Call to undefined function: json_encode() in /in/ApUQ7 on line 3
Process exited with code 255.
Output for 4.3.2 - 4.4.4
l Fatal error: Call to undefined function: json_encode() in /in/ApUQ7 on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1
l Fatal error: Call to undefined function: json_encode() in /in/ApUQ7 on line 3