3v4l.org

run code in 300+ PHP versions simultaneously
<?php class A { public function add() {} } class B extends A { public function add(A $i) {} }
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
Fatal error: Declaration of B::add(A $i) must be compatible with A::add() in /in/hViWi on line 10
Process exited with code 255.
Output for 7.4.0 - 7.4.33
Warning: Declaration of B::add(A $i) should be compatible with A::add() in /in/hViWi on line 10
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33
Warning: Declaration of B::add(A $i) should be compatible with A::add() in /in/hViWi on line 11
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Strict Standards: Declaration of B::add() should be compatible with A::add() in /in/hViWi on line 11
preferences:
184.37 ms | 402 KiB | 197 Q