3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = new StdClass(); echo json_encode($a) . PHP_EOL; echo json_encode($a,JSON_FORCE_OBJECT) . PHP_EOL;
Output for 5.3.0 - 7.2.0
{} {}
Output for 5.2.0 - 5.2.17
{} Notice: Use of undefined constant JSON_FORCE_OBJECT - assumed 'JSON_FORCE_OBJECT' in /in/vM9oE on line 5 Warning: json_encode() expects exactly 1 parameter, 2 given in /in/vM9oE on line 5
Output for 5.0.0 - 5.1.6
Fatal error: Call to undefined function json_encode() in /in/vM9oE 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/vM9oE 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/vM9oE 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/vM9oE on line 4