3v4l.org

run code in 300+ PHP versions simultaneously
<?php trait T { abstract public function test(int $x); } abstract class P { use T; } class C extends P { public function test(string $x) {} }
Output for 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Fatal error: Declaration of C::test(string $x) must be compatible with P::test(int $x) in /in/q7Bq2 on line 12
Process exited with code 255.
Output for 7.2.0 - 7.2.34, 7.3.0 - 7.3.33
Fatal error: Declaration of C::test(string $x) must be compatible with P::test(int $x) in /in/q7Bq2 on line 11
Process exited with code 255.

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