How can hidden fields be used effectively to pass data between PHP pages?

Hidden fields can be used effectively to pass data between PHP pages by including them in a form on one page and submitting the form to another PHP page. The hidden fields can store values that need to be passed along with the form submission, such as user IDs or session tokens. On the receiving PHP page, the hidden field values can be accessed using the $_POST superglobal array. 

<!-- On the first PHP page -->
<form action="second_page.php" method="post">
    <input type="hidden" name="user_id" value="123">
    <input type="submit" value="Submit">
</form>
```

```php
// On the second PHP page (second_page.php)
$user_id = $_POST['user_id'];
echo "User ID: " . $user_id;

Keywords

hidden fields data passing PHP pages form submission server-side processing

Related Questions