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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(A $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/9hpBZ 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/9hpBZ on line 16
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33
Fatal error: Declaration of Y::test(B $b) must be compatible with X::test(A $a) in /in/9hpBZ on line 24
Process exited with code 255.
Output for 5.4.11 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28
Fatal error: Declaration of Y::test(B $b) must be compatible with X::test(A $a) in /in/9hpBZ on line 28
Process exited with code 255.
Output for 5.4.2 - 5.4.10
Fatal error: Declaration of X::test(A $a) must be compatible with Y::test(B $b) in /in/9hpBZ on line 28
Process exited with code 255.

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