3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump(json_decode('NULL')); var_dump(json_last_error);
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
NULL Fatal error: Uncaught Error: Undefined constant "json_last_error" in /in/uqWQp:4 Stack trace: #0 {main} thrown in /in/uqWQp on line 4
Process exited with code 255.
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
NULL Warning: Use of undefined constant json_last_error - assumed 'json_last_error' (this will throw an Error in a future version of PHP) in /in/uqWQp on line 4 string(15) "json_last_error"
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.38, 7.0.0 - 7.0.33, 7.1.0 - 7.1.25
NULL Notice: Use of undefined constant json_last_error - assumed 'json_last_error' in /in/uqWQp on line 4 string(15) "json_last_error"

preferences:
252.2 ms | 402 KiB | 294 Q