PHP - 获取FDF值模块

fdf_get_value() 函数可以获取字段的值。

语法

mixed fdf_get_value( resource $fdf_document , string $fieldname [, int $which = -1 ] )

fdf_get_value() 函数可以获取请求的字段名的值。可以通过传递一个可选的索引（从零开始）来检索数组字段的元素。对于非数组字段，可以忽略可选参数。

示例

<?php
   $fdf = fdf_open_string($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);
?>