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<?php trait SomeTrait { public $b = true; } class Food { use SomeTrait; public $i = 0; } class AnimalFood extends Food {} interface Animal { public function eat(AnimalFood $food); } class Dog implements Animal { public function eat(Food $food) {} } var_dump(new AnimalFood);
Output for 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
object(AnimalFood)#1 (2) { ["i"]=> int(0) ["b"]=> bool(true) }
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 object(AnimalFood)#1 (2) { ["i"]=> int(0) ["b"]=> bool(true) }
Output for 7.3.0 - 7.3.33
Fatal error: Declaration of Dog::eat(Food $food) must be compatible with Animal::eat(AnimalFood $food) in /in/RsDcu on line 18
Process exited with code 255.
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136.49 ms | 401 KiB | 154 Q