3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = json_decode(null); var_dump($a); var_dump(json_last_error());
Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Deprecated: json_decode(): Passing null to parameter #1 ($json) of type string is deprecated in /in/L7dsR on line 3 NULL int(4)
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30
NULL int(4)
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
NULL int(0)
preferences:
158.4 ms | 402 KiB | 183 Q