3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php var_dump(array_keys(json_decode(json_encode(array("foo\0bar" => 'xyz')))));
Output for 5.3.0 - 5.6.28, 7.0.0 - 7.1.0
Warning: array_keys() expects parameter 1 to be array, object given in /in/Dp5Sl on line 2 NULL
Output for hhvm-3.10.0 - 3.12.0
Warning: array_keys() expects parameter 1 to be an array or collection in /in/Dp5Sl on line 2 NULL
Output for 5.2.0 - 5.2.17
Warning: array_keys(): The first argument should be an array in /in/Dp5Sl on line 2 NULL
Output for 5.0.0 - 5.1.6
Fatal error: Call to undefined function json_decode() in /in/Dp5Sl on line 2
Process exited with code 255.
Output for 4.4.5 - 4.4.9
Fatal error: Call to undefined function: json_decode() in /in/Dp5Sl on line 2
Process exited with code 255.
Output for 4.3.2 - 4.4.4
Fatal error: Call to undefined function: json_decode() in /in/Dp5Sl on line 2
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: json_decode() in /in/Dp5Sl on line 2