3v4l.org

run code in 200+ PHP versions simultaneously
<?php trait T1 { abstract public function test($x); } trait T2 { abstract public function test($x): int; } class C { use T1, T2; public function test($x): int {} }
based on q7Bq2
Output for 7.4.0 - 7.4.2
Fatal error: Declaration of T1::test($x) must be compatible with T2::test($x): int in /in/8Ze2C on line 4
Process exited with code 255.
Output for 7.2.0 - 7.3.13
Fatal error: Declaration of T1::test($x) must be compatible with T2::test($x): int in /in/8Ze2C on line 11
Process exited with code 255.