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# fdf_open

fdf_open -- Open a FDF document

## Description

`int 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
    <?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 data
    $fdf = fdf_open("test.fdf");
    ...
    fdf_close($fdf);
    ?>

See also fdf_close().

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