&reftitle.examples;

The following examples shows just the evaluation of form data.

## 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);
    ?>