How to create a `Typed` array in php? [duplicate]

Question

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;
}

What do you mean by "type array"? classA $someName denotes that that variable is of type classA, and not an array — Nico Haase
– Nico Haase, Commented Aug 14, 2021 at 15:29

Daniel · Accepted Answer · 2021-08-14 07:33:22Z

3

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

answered Aug 14, 2021 at 7:33

Daniel

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