PHP: rfc:typed-properties

Typed Properties allow for an optional keyword in the definition, after the visibility scope, which contains the type the property should allow. Properties can have the same types as parameters: class Foo { public int $int = 1; public float $flt = 2.2; public array $arr = []; public bool $bool = false; public string $string; public callable $callable; public stdClass $std; public OtherThing $other