3v4l.org

run code in 300+ PHP versions simultaneously
<?php class a {function c(int $a = null) {} } class b extends a {function c(?int $a = null) {} } class d extends b {function c(int $a = null) {} }
Output for 8.4.1 - 8.4.12
Deprecated: a::c(): Implicitly marking parameter $a as nullable is deprecated, the explicit nullable type must be used instead in /in/5vo1U on line 3 Deprecated: d::c(): Implicitly marking parameter $a as nullable is deprecated, the explicit nullable type must be used instead in /in/5vo1U on line 5
Output for 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25
preferences:
67.35 ms | 407 KiB | 5 Q