3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump(md5(null));
Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Deprecated: md5(): Passing null to parameter #1 ($string) of type string is deprecated in /in/4eOMD on line 3 string(32) "d41d8cd98f00b204e9800998ecf8427e"
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30
string(32) "d41d8cd98f00b204e9800998ecf8427e"

preferences:
279.96 ms | 405 KiB | 468 Q