Online PHP editor | output for QTd0b

<?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(Printable & string $aString) { echo $aString; } printSomething(new MyPrintableClass()); printSomething("You can't print a real sting");