PHP: Create anonymous class with function result

Question

When generating an object this way AND executing a method, PHP gives an error.

class A {

    static public function b() {

        $o = new get_called_class();                  // works

        $class = get_called_class();
        $o = new $class;                              // works

        $o = (new $class)->method();                  // works

        $o = (new get_called_class())->method();      // doesn't work
        // error message: Class '...\get_called_class' not found

        $o = (new (get_called_class()))->method();    // doesn't work
        // error message: syntax error, unexpected '('
    }
}

Why does the last lines fail?

How to write it in one line?

The other lines do not work either. You have missing ; and undefined class get_called_class — Dharman
– Dharman ♦, Commented Jul 19, 2019 at 18:53
@MarkusZeller None of my quedtions were answered. Looking still for an answer to both of my questions. — WeSee
– WeSee, Commented Sep 2, 2019 at 19:33
It is simply answered by "If you want to use an instance, store it in a variable." — Markus Zeller
– Markus Zeller, Commented Sep 2, 2019 at 19:36

Dharman · Accepted Answer · 2019-07-19 19:10:30Z

2

Unfortunately you can't do it directly with the function's return value, but you can save it into a variables and use the variable. You can also use static or self constants.

$class = get_called_class();
$o = (new $class())->method();
$o = (new static())->method();
$o = (new self())->method();

edited Jul 19, 2019 at 19:10

answered Jul 19, 2019 at 18:54

Dharman♦

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Markus Zeller · Accepted Answer · 2019-07-19 19:50:54Z

1

Not possible at all. If you want to use an instance, store it in a variable.

class MyClass {
     public function method(): string {
          return "Hello World";
     }
}

$instance = new MyClass();
$result = $instance->method();

You could work around if you do not need an instance by using a static method.

class MyClass {
     public static function method(): string {
          return "Hello World";
     }
}

$result = MyClass::method();

answered Jul 19, 2019 at 19:50

Markus Zeller

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