What are some best practices for formatting input names in HTML forms to work with PHP arrays?

When working with HTML forms that submit input names as arrays to PHP, it is important to format the input names correctly to ensure that PHP can process them as arrays. One common practice is to use square brackets '[]' at the end of the input name to indicate that the values should be treated as an array. For example, if you have multiple input fields with the same name, you can append '[]' to the name to create an array of values when the form is submitted.

<form method="post" action="process_form.php">
    <input type="text" name="user[name]">
    <input type="text" name="user[email]">
    <input type="text" name="user[phone]">
    <input type="submit" value="Submit">
</form>
```

In the PHP code that processes the form submission, you can access the input values as an array like this:

```php
<?php
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    $userData = $_POST['user'];
    $name = $userData['name'];
    $email = $userData['email'];
    $phone = $userData['phone'];
    
    // Process the form data
}
?>