3v4l.org

run code in 300+ PHP versions simultaneously
<?php interface foo { function foo($x, $y = NULL); } class bar implements foo { function foo($x) {} }
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
Fatal error: Declaration of bar::foo($x) must be compatible with foo::foo($x, $y = null) in /in/vbC21 on line 7
Process exited with code 255.
Output for 7.4.0 - 7.4.33
Fatal error: Declaration of bar::foo($x) must be compatible with foo::foo($x, $y = NULL) in /in/vbC21 on line 7
Process exited with code 255.
Output for 7.1.25 - 7.1.30, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33
Fatal error: Declaration of bar::foo($x) must be compatible with foo::foo($x, $y = NULL) in /in/vbC21 on line 6
Process exited with code 255.
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