Online PHP editor | output for WddK6

<?php interface Printable { public function __toString(); } class MyPrintableClass implements Printable { public $myNumericProperty; public function __construct() { $this->myNumericProperty = 10; } public function __toString() { return 'My numeric property is ' . $this->myNumericProperty; } } function printSomething(string $printable) { echo $printable; } printSomething(new MyPrintableClass()); printSomething("You can't print a real sting"); printSomething(1234); printSomething(1.2); printSomething(true);