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 - 8.4.18, 8.5.0 - 8.5.3
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 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30
preferences:
73.24 ms | 981 KiB | 4 Q