(PHP 4 >= 4.3.0, PHP 5, PHP 7) Get the appearance of a field

(PHP 4, PHP 5, PHP 7) Set the appearance of a field

(PHP 4 >= 4.3.0, PHP 5, PHP 7) Gets a value from the opt array of a field

(PHP 4 >= 4.3.0, PHP 5, PHP 7) Sets FDF-specific output headers

(PHP 4 >= 4.0.7, PHP 5, PHP 7) Sets FDF character encoding

(PHP 4, PHP 5, PHP 7) Set PDF document to display FDF data in

(PHP 4 >= 4.3.0, PHP 5, PHP 7) Gets the flags of a field

(PHP 4 >= 4.3.0, PHP 5, PHP 7) Adds javascript code to the FDF document

(PHP 4 >= 4.3.0, PHP 5, PHP 7) Adds javascript code to be executed when Acrobat opens the FDF

(PHP 4, PHP 5, PHP 7) Get the value of the /F key