(PHP 5 >= 5.2.0, PHP 7) Gets the interface names

(PHP 4, PHP 5, PHP 7) Set the type of a variable

(PHP 4 >= 4.0.7, PHP 5, PHP 7) Checks if the given key or index exists in the array

(PHP >= 5.4.0) Returns whether this extension is persistent

(PHP >= 5.4.0) Gets URL public string Ref

(PHP 5, PHP 7) Creates a new class instance from given arguments.

(PHP 5, PHP 7) Checks if is internal public bool

(PHP 5, PHP 7) Checks if returns reference public

(PECL quickhash >= Unknown) This method retrieves a value from the hash by its key

(PHP >= 5.4.0) Returns whether this parameter can be passed by value