3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = array(); //$a = "" $a = json_encode($a, false); //var_dump(implode($a, "','")); var_dump($a);
Output for 5.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
string(2) "[]"
Output for 5.2.0 - 5.2.17
Warning: json_encode() expects exactly 1 parameter, 2 given in /in/0Hlng on line 4 NULL
Output for 5.0.0 - 5.1.6
Fatal error: Call to undefined function json_encode() in /in/0Hlng 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/0Hlng 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/0Hlng 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/0Hlng on line 4