3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php var_dump(json_encode(array(1, 2, true, null)));
Output for 5.2.0 - 7.1.0
string(15) "[1,2,true,null]"
Output for 5.0.0 - 5.1.6
Fatal error: Call to undefined function json_encode() in /in/k1oIo 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/k1oIo 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/k1oIo 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/k1oIo on line 4