3v4l.org

run code in 300+ PHP versions simultaneously
<?php trait T1 { abstract public function test(); } trait T2 { abstract public function test(): int; } class C { use T1, T2; function test(): int {} } ?>
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.26, 8.4.1 - 8.4.13
Output for 7.4.0 - 7.4.33
Fatal error: Declaration of T1::test() must be compatible with T2::test(): int in /in/VrpaV on line 4
Process exited with code 255.
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.33
Fatal error: Declaration of T1::test() must be compatible with T2::test(): int in /in/VrpaV on line 10
Process exited with code 255.
preferences:
172.23 ms | 408 KiB | 5 Q