(PHP 5, PHP 7) Checks if a subclass public bool

(PHP >= 5.4.0) Gets URL public string Ref

(PHP 4, PHP 5, PHP 7) Finds whether the type of a variable is float

(PECL quickhash >= Unknown) Creates a new QuickHashIntHash object

(PHP 4, PHP 5, PHP 7) Alias of

(PHP >= 5.4.0) Export public static string

(PHP 5 >= 5.3.0, PHP 7) Replaces elements from passed arrays into the first array recursively

(PHP 4, PHP 5, PHP 7) Alias of

(PHP >= 5.4.0) Returns this pointer bound to closure

(PHP 5, PHP 7) To string abstract public void