Default super class in PHP

Asked Oct 31 '18 at 16:17

Active Oct 31 '18 at 16:27

Viewed 53 times

I am doing mostly .NET/Java but now I am doing PHP. I have a class,

class MyClass{
    private $data;
    public function __construct(object $data) {        
        $this->data = $data;
    }
}
class B{

}

echo new MyClass(new B());

When I call this I am getting this error,

Argument 1 passed to MyClass::__construct() must be an instance of object, instance of B given, called in /run_dir/repl.php(56) : eval()'d code on line 11

In C# the super class is object but don't know why its not work in PHP.

edited Oct 31 '18 at 16:27

Funk Forty Niner

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asked Oct 31 '18 at 16:17

Imran Qadir Baksh - Baloch

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Funny I get `Recoverable fatal error: Object of class MyClass could not be converted to string in D:\PHP-SOURCE\tst.php on line 12` – RiggsFolly Oct 31 '18 at 16:19
2

https://stackoverflow.com/questions/931407/what-is-stdclass-in-php – Rain Oct 31 '18 at 16:21
Well, when you're using "Object" (literally meaning any in Java), you can simply remove the type since it makes no sense to use it (and you don't have to in PHP). – maio290 Oct 31 '18 at 16:22
Also strange: When I fix the above error by `$x = new MyClass(new B());` I dont get any errors at all???? What version of PHP are you using?? – RiggsFolly Oct 31 '18 at 16:23
3

What version of PHP are you using? The `object` type-hint wasn't introduced until PHP 7.2. And note that it still isn't technically a superclass, it just allows passing an instance of any object. – iainn Oct 31 '18 at 16:26
1

Using PHP 7.2. Your code will work. Should add `__toString()` method to see the result. – Khoa TruongDinh Oct 31 '18 at 16:47
Yes with Php 7.2 it works but this question is marked as duplicate? – Imran Qadir Baksh - Baloch Nov 01 '18 at 07:40
@RiggsFolly I think depend upon version – Imran Qadir Baksh - Baloch Nov 01 '18 at 07:41

Default super class in PHP

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