# fdf_open_string

(PHP 4 >= 4.3.0, PHP 5, PHP 7)

fdf_open_string — Read a FDF document from a string

### 说明

fdf_open_string ( string `$fdf_data` ) : resource

Reads form data from a string.

You can use fdf_open_string() together with $HTTP_FDF_DATA to process FDF form input from a remote client.

### 参数

`fdf_data`

  The data as returned from a PDF form or created using fdf_create() and fdf_save_string().

### 返回值

Returns a FDF document handle, or `FALSE` on error.

### 范例

Example #1 Accessing the form data

    <?php
    $fdf = fdf_open_string($HTTP_FDF_DATA);
    /* ... */
    fdf_close($fdf);
    ?>

### 参见

- fdf_open() - Open a FDF document
- fdf_close() - Close an FDF document
- fdf_create() - Create a new FDF document
- fdf_save_string() - Returns the FDF document as a string