(PHP 4 >= 4.2.0, PHP 5, PHP 7) Reads the EXIF headers

(PHP 4 >= 4.2.0, PHP 5, PHP 7) Get the header name for an index

(PHP 4 >= 4.0.1, PHP 5, PHP 7) Alias of

(PHP 4 >= 4.3.0, PHP 5, PHP 7) Determine the type of an image

(PHP 4 >= 4.2.0, PHP 5, PHP 7) Retrieve the embedded thumbnail of a TIFF or JPEG image