Question

I am currently using something like

class User{

    /* @var Contacts*/
    public $contacts = array();
}

$userObj = new User();
$userObj->contacts[] = new Contact(...);
$userObj->contacts[] = new Contact(...);

Tough we can document the type of variable using phpDocumentor, is it also possible to restrict other types of objects to be assigned to the contacts array

$userObj->contacts[] = 2.3 //should be considered as invalid

Answer 1

Not how it works in php

Here is what you can do instead

class User{

    /* @var Contacts*/
    private $contacts = array();

    public function setContacts(Contact $contact){
        $this->contacts[] = $contacts;
    }
}

No you can use it like so

$userObj = new User();
$userObj->setContacts(new Contact(...));

And the following will cause an error

$userObj->setContacts(2.3);