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<?php class A { public function xx(int $a, float $b) { print_r(func_get_args()); } } class B extends A { public function xx(int $rename, float $b) { parent::xx(...func_get_args()); } } $a = new A(); $a->xx(1, 2); $a->xx(a: 1, b: 2); $b = new B(); $b->xx(1, 2); $b->xx(a: 1, b: 2);
Output for 8.1.23 - 8.1.27, 8.2.10 - 8.2.17, 8.3.0 - 8.3.4
Array ( [0] => 1 [1] => 2 ) Array ( [0] => 1 [1] => 2 ) Array ( [0] => 1 [1] => 2 ) Fatal error: Uncaught Error: Unknown named parameter $a in /in/kgHWf:23 Stack trace: #0 {main} thrown in /in/kgHWf on line 23
Process exited with code 255.
Output for 7.3.0 - 7.3.23, 7.4.0 - 7.4.11
Parse error: syntax error, unexpected ':', expecting ')' in /in/kgHWf on line 19
Process exited with code 255.
Output for 7.2.0 - 7.2.34
Parse error: syntax error, unexpected ':', expecting ',' or ')' in /in/kgHWf on line 19
Process exited with code 255.

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