How can additional fields be used to pass values in PHP forms?

To pass additional values in PHP forms, you can include hidden input fields within the form. These hidden fields can store values that you want to pass along with the form submission but do not want the user to see or modify. By adding these hidden fields to the form, you can access the values in the PHP script that processes the form submission. 

<form method="post" action="process_form.php">
    <input type="text" name="username" placeholder="Username">
    <input type="password" name="password" placeholder="Password">
    <input type="hidden" name="additional_field" value="additional_value">
    <button type="submit">Submit</button>
</form>
```

In the PHP script "process_form.php", you can access the value of the hidden field like this:

```php
$additionalValue = $_POST['additional_field'];

Keywords

PHP forms additional fields values passing data manipulation

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