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<?php abstract class Test { function foo(...$bar) {} } class Test2 extends Test { function foo($split, ...$bar) {} }
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Fatal error: Declaration of Test2::foo($split, ...$bar) must be compatible with Test::foo(...$bar) in /in/DZ21P on line 9
Process exited with code 255.
Output for 7.4.0 - 7.4.33
Warning: Declaration of Test2::foo($split, ...$bar) should be compatible with Test::foo(...$bar) in /in/DZ21P on line 9
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33
Warning: Declaration of Test2::foo($split, ...$bar) should be compatible with Test::foo(...$bar) in /in/DZ21P on line 10
Output for 5.6.8 - 5.6.28
Strict Standards: Declaration of Test2::foo() should be compatible with Test::foo(...$bar) in /in/DZ21P on line 10
Output for 5.4.1 - 5.4.45, 5.5.24 - 5.5.35
Parse error: syntax error, unexpected '.', expecting '&' or variable (T_VARIABLE) in /in/DZ21P on line 5
Process exited with code 255.

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