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The following examples shows just the evaluation of form data.
Example #1 Evaluating a FDF document
<?php
// Open fdf from input string provided by the extension
// The pdf form contained several input text fields with the names
// volume, date, comment, publisher, preparer, and two checkboxes
// show_publisher and show_preparer.
$fdf = fdf_open_string ( $HTTP_FDF_DATA );
$volume = fdf_get_value ( $fdf , "volume" );
echo "The volume field has the value '<b> $volume </b>'<br />" ;
$date = fdf_get_value ( $fdf , "date" );
echo "The date field has the value '<b> $date </b>'<br />" ;
$comment = fdf_get_value ( $fdf , "comment" );
echo "The comment field has the value '<b> $comment </b>'<br />" ;
if ( fdf_get_value ( $fdf , "show_publisher" ) == "On" ) {
$publisher = fdf_get_value ( $fdf , "publisher" );
echo "The publisher field has the value '<b> $publisher </b>'<br />" ;
} else
echo "Publisher shall not be shown.<br />" ;
if ( fdf_get_value ( $fdf , "show_preparer" ) == "On" ) {
$preparer = fdf_get_value ( $fdf , "preparer" );
echo "The preparer field has the value '<b> $preparer </b>'<br />" ;
} else
echo "Preparer shall not be shown.<br />" ;
fdf_close ( $fdf );
?>