3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php echo json_encode('{"t1": 1}', JSON_PRETTY_PRINT); ?>
Output for 5.4.0 - 7.1.0
"{\"t1\": 1}"
Output for 5.3.0 - 5.3.29
Notice: Use of undefined constant JSON_PRETTY_PRINT - assumed 'JSON_PRETTY_PRINT' in /in/PBhrD on line 2 Warning: json_encode() expects parameter 2 to be long, string given in /in/PBhrD on line 2
Output for 5.2.0 - 5.2.17
Notice: Use of undefined constant JSON_PRETTY_PRINT - assumed 'JSON_PRETTY_PRINT' in /in/PBhrD on line 2 Warning: json_encode() expects exactly 1 parameter, 2 given in /in/PBhrD on line 2
Output for 5.0.0 - 5.1.6
Fatal error: Call to undefined function json_encode() in /in/PBhrD on line 2
Process exited with code 255.
Output for 4.4.5 - 4.4.9
Fatal error: Call to undefined function: json_encode() in /in/PBhrD on line 2
Process exited with code 255.
Output for 4.3.2 - 4.4.4
Fatal error: Call to undefined function: json_encode() in /in/PBhrD on line 2
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: json_encode() in /in/PBhrD on line 2