# fdf_get_version

(PHP 4 >= 4.3.0, PHP 5, PHP 7)

fdf_get_version — Gets version number for FDF API or file

### 说明

fdf_get_version ([ resource `$fdf_document` ] ) : string

Return the FDF version for the given document, or the toolkit API version number if no parameter is given.

### 参数

`fdf_document`

  The FDF document handle, returned by fdf_create(), fdf_open() or fdf_open_string().

### 返回值

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.

### 参见

- fdf_set_version() - Sets version number for a FDF file