3v4l.org

run code in 300+ PHP versions simultaneously
<?php $data = array('top_level_data' => array('extension' => array(), 'sub_level_data1' => 0 ) ); $data['top_level_data']['extension'] = (object)$data['top_level_data']['extension']; $data['top_level_data'] = array($data['top_level_data']); echo json_encode($data, JSON_PRETTY_PRINT); $data = array('top_level_data' => array( array('extension' => (object)array(), 'sub_level_data1' => 0 ) ) ); echo json_encode($data, JSON_PRETTY_PRINT);
Output for 5.4.28 - 5.4.45, 5.5.12 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.32, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.26, 8.4.1 - 8.4.13
{ "top_level_data": [ { "extension": {}, "sub_level_data1": 0 } ] }{ "top_level_data": [ { "extension": {}, "sub_level_data1": 0 } ] }
Output for 5.4.0 - 5.4.27, 5.5.0 - 5.5.11
{ "top_level_data": [ { "extension": { }, "sub_level_data1": 0 } ] }{ "top_level_data": [ { "extension": { }, "sub_level_data1": 0 } ] }
Output for 5.3.0 - 5.3.29
Notice: Use of undefined constant JSON_PRETTY_PRINT - assumed 'JSON_PRETTY_PRINT' in /in/PJ71s on line 9 Warning: json_encode() expects parameter 2 to be long, string given in /in/PJ71s on line 9 Notice: Use of undefined constant JSON_PRETTY_PRINT - assumed 'JSON_PRETTY_PRINT' in /in/PJ71s on line 17 Warning: json_encode() expects parameter 2 to be long, string given in /in/PJ71s on line 17
Output for 5.2.0 - 5.2.17
Notice: Use of undefined constant JSON_PRETTY_PRINT - assumed 'JSON_PRETTY_PRINT' in /in/PJ71s on line 9 Warning: json_encode() expects exactly 1 parameter, 2 given in /in/PJ71s on line 9 Notice: Use of undefined constant JSON_PRETTY_PRINT - assumed 'JSON_PRETTY_PRINT' in /in/PJ71s on line 17 Warning: json_encode() expects exactly 1 parameter, 2 given in /in/PJ71s on line 17
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6
Fatal error: Call to undefined function json_encode() in /in/PJ71s on line 9
Process exited with code 255.
Output for 4.4.5 - 4.4.9
Fatal error: Call to undefined function: json_encode() in /in/PJ71s on line 9
Process exited with code 255.
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.4
Fatal error: Call to undefined function: json_encode() in /in/PJ71s on line 9
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: json_encode() in /in/PJ71s on line 9
preferences:
167.35 ms | 414 KiB | 5 Q