resource fdf_open( string $filename )

<?php
   // Save the FDF data into a temp file
   fdffp = fopen("test.fdf", "w");
   fwrite(fdffp, HTTP_FDF_DATA, strlen(HTTP_FDF_DATA));
   fclose(fdffp);
   // Open temp file and evaluate datafdf = fdf_open("test.fdf");
   fdf_close($fdf);
?>