3v4l.org

run code in 300+ PHP versions simultaneously
<?php trait X{ function tryA(A $a){ $this->test($a); } abstract function test(A $a); } trait Y{ function tryB(B $b){ $this->test($b); } abstract function test(B $b); } interface LOLI{ function test(B $b); } class LOL implements LOLI{ use X, Y; function test(A $a){} } class A{} class B{} $x = new LOL; $x->tryA(new A); $x->tryB(new B);
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 LOL::test(A $a) must be compatible with Y::test(B $b) in /in/oJJgg on line 27
Process exited with code 255.
Output for 7.4.0 - 7.4.33
Fatal error: Declaration of Y::test(B $b) must be compatible with X::test(A $a) in /in/oJJgg on line 16
Process exited with code 255.
Output for 7.0.6 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33
Fatal error: Declaration of Y::test(B $b) must be compatible with X::test(A $a) in /in/oJJgg on line 24
Process exited with code 255.
Output for 7.0.0 - 7.0.5
Fatal error: Declaration of LOL::test(A $a) must be compatible with LOLI::test(B $b) in /in/oJJgg on line 24
Process exited with code 255.
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28
Fatal error: Declaration of LOL::test() must be compatible with LOLI::test(B $b) in /in/oJJgg on line 24
Process exited with code 255.

preferences:
208.49 ms | 402 KiB | 287 Q