(PHP 4 >= 4.3.0, PHP 5)
fdf_get_version — Gets version number for FDF API or file
Return the FDF version for the given document, or the toolkit API version number if no parameter is given.
The FDF document handle, returned by fdf_create(), fdf_open() or fdf_open_string().
Returns the version as a string. For the current FDF toolkit 5.0 the API version number is 5.0 and the document version number is either 1.2, 1.3 or 1.4.