(PHP 5 >= 5.2.0, PHP 7) Checks if variable of specified type exists

(PHP 5, PHP 7) Exports public static string

(PHP 4, PHP 5, PHP 7) Register a function for execution on shutdown

(PHP 4, PHP 5, PHP 7) Return all the values of an array

(PHP 5, PHP 7) Gets declaring class for the reflected method.

(PHP 4, PHP 5, PHP 7) Finds whether a variable is a number or a numeric string

(PHP 4 >= 4.2.0, PHP 5, PHP 7) Split an array into chunks

(PHP 4, PHP 5, PHP 7) Fetch a key from an array

(PHP >= 5.4.0) Creates a new class instance without invoking the constructor.

(PHP 5, PHP 7) Gets extension name public string