3v4l.org

run code in 300+ PHP versions simultaneously
<?php class Foo { protected function f($a, $b) { echo "Foo\n"; } } class Bar extends Foo { protected function f($a, $b, $c) { echo "Bar\n"; } }
Output for 8.5.0 - 8.5.3
Fatal error: Declaration of Bar::f($a, $b, $c) must be compatible with Foo::f($a, $b) in /in/S48gf on line 13 Stack trace: #0 {main}
Process exited with code 255.
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18
Fatal error: Declaration of Bar::f($a, $b, $c) must be compatible with Foo::f($a, $b) in /in/S48gf on line 13
Process exited with code 255.
Output for 7.4.0 - 7.4.33
Warning: Declaration of Bar::f($a, $b, $c) should be compatible with Foo::f($a, $b) in /in/S48gf on line 13
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33
Warning: Declaration of Bar::f($a, $b, $c) should be compatible with Foo::f($a, $b) in /in/S48gf on line 17
Output for 5.6.0 - 5.6.23
Strict Standards: Declaration of Bar::f() should be compatible with Foo::f($a, $b) in /in/S48gf on line 17
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