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run code in 300+ PHP versions simultaneously
<?php $o=new stdClass(); $o->name="هدایت"; echo json_encode($o,JSON_UNSCAPE_UNICODE);
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7
Fatal error: Uncaught Error: Undefined constant "JSON_UNSCAPE_UNICODE" in /in/O3Uda:5 Stack trace: #0 {main} thrown in /in/O3Uda on line 5
Process exited with code 255.
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Warning: Use of undefined constant JSON_UNSCAPE_UNICODE - assumed 'JSON_UNSCAPE_UNICODE' (this will throw an Error in a future version of PHP) in /in/O3Uda on line 5 Warning: json_encode() expects parameter 2 to be int, string given in /in/O3Uda on line 5
Output for 7.2.0 - 7.2.33
Warning: Use of undefined constant JSON_UNSCAPE_UNICODE - assumed 'JSON_UNSCAPE_UNICODE' (this will throw an Error in a future version of PHP) in /in/O3Uda on line 5 Warning: json_encode() expects parameter 2 to be integer, string given in /in/O3Uda on line 5
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.33
Notice: Use of undefined constant JSON_UNSCAPE_UNICODE - assumed 'JSON_UNSCAPE_UNICODE' in /in/O3Uda on line 5 Warning: json_encode() expects parameter 2 to be integer, string given in /in/O3Uda on line 5

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