fdf_openPHP ManualPrevNextfdf_openfdf_open -- Open a FDF documentDescriptionint fdf_open(string filename); The fdf_open() function opens a file with form data. This file must contain the data as returned from a PDF form. Currently, the file has to be created 'manually' by using fopen() and writing the content of HTTP_FDF_DATA with fwrite() into it. A mechanism like for HTML form data where for each input field a variable is created does not exist. Example 1. Accessing the form data 1  2 <?php 3 // Save the FDF data into a temp file 4 $fdffp = fopen("test.fdf", "w"); 5 fwrite($fdffp, $HTTP_FDF_DATA, strlen($HTTP_FDF_DATA)); 6 fclose($fdffp); 7  8 // Open temp file and evaluate data 9 $fdf = fdf_open("test.fdf"); 10 ... 11 fdf_close($fdf); 12 ?> 13  See also fdf_close().PrevHomeNextForms Data Format functionsUpfdf_close