(PHP 4 >= 4.3.0, PHP 5 < 5.3.0, PECL fdf SVN)
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.
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.