# fdf_open

(PHP 4, PHP 5 < 5.3.0, PECL fdf SVN)

fdf_open — Open a FDF document

### 说明

fdf_open(string `$filename`): resource

Opens a file with form data.

You can also use fdf_open_string() to process the results of a PDF form POST request.

### 参数

`filename`
  Path to the FDF file. This file must contain the data as returned from a PDF form or created using fdf_create() and fdf_save().

### 返回值

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

### 示例

示例 #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);
?>`

### 参见

- fdf_open_string() - Read a FDF document from a string
- fdf_close() - Close an FDF document
- fdf_create() - Create a new FDF document
- fdf_save() - Save a FDF document

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