phpstrong-typingtype-declaration

How to create a `Typed` array in php?

I'd like to do something like that, creating a defined type array of classA inside classB, However, I can't find the syntax.

class classA{
}

class classB{
    private classA $someName:array;
}
Solution

  • there are no typed arrays in php, but you may implement a wrapping class to an array, or a set of functions with variadic arguments. for instance:

    class classB{
    private array $arr;
    public function __construct(classA ...$classAs){
       this->$arr = $classAs;
    }
}

    you may read more about it here: https://www.cloudsavvyit.com/10040/approaches-to-creating-typed-arrays-in-php/

    another approach could be to extend the array class, and make a typecheck with instanceof on each element as mentioned here: Type hinting - specify an array of objects