3v4l.org

run code in 300+ PHP versions simultaneously
<?php class Foo{ function method($a){ } } class Bar extends Foo{ function method(array $a){ } }
Output for 8.0.0 - 8.0.19, 8.1.0 - 8.1.6
Fatal error: Declaration of Bar::method(array $a) must be compatible with Foo::method($a) in /in/fSIbS on line 8
Process exited with code 255.
Output for 7.4.0 - 7.4.29
Warning: Declaration of Bar::method(array $a) should be compatible with Foo::method($a) in /in/fSIbS on line 8
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33
Warning: Declaration of Bar::method(array $a) should be compatible with Foo::method($a) in /in/fSIbS on line 11
Output for 5.6.0 - 5.6.40
Strict Standards: Declaration of Bar::method() should be compatible with Foo::method($a) in /in/fSIbS on line 11

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