(PHP 5 >= 5.4.0, PHP 7) Change stream options

(PHP 5 >= 5.3.0, PHP 7) Retrieve the underlaying resource

(PHP 5, PHP 7) Delete a file public bool streamWrapper::unlink

(PHP 4 >= 4.3.2, PHP 5, PHP 7) Tests for end-of-file on a file pointer

(PHP 4 >= 4.3.2, PHP 5, PHP 7) Constructs a new stream wrapper