How can hidden input fields be used effectively in PHP forms to determine the file to be downloaded when using multiple download buttons?

Hidden input fields can be used effectively in PHP forms to determine the file to be downloaded when using multiple download buttons by setting a unique value in each hidden input field corresponding to the file to be downloaded. When a download button is clicked, the form is submitted with the hidden input field value indicating the file to be downloaded. In the PHP script handling the form submission, the value of the hidden input field can be used to determine which file to serve for download. 

<form method="post" action="download.php">
    <input type="hidden" name="file" value="file1.pdf">
    <button type="submit" name="download">Download File 1</button>
</form>

<form method="post" action="download.php">
    <input type="hidden" name="file" value="file2.pdf">
    <button type="submit" name="download">Download File 2</button>
</form>
```

In the `download.php` script:

```php
<?php
if(isset($_POST['download'])) {
    $file = $_POST['file'];
    // Add appropriate file path and headers for file download
    header("Content-Disposition: attachment; filename=" . $file);
    readfile($file);
    exit;
}
?>

Keywords

hidden input fields PHP forms file download multiple buttons determine file

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