How can you structure the PHP code to evaluate a form within the same file or include external files as needed?

When evaluating a form within the same PHP file, you can structure your code by checking if the form has been submitted using the `$_POST` superglobal. If the form is submitted, you can process the form data within the same file. If you need to include external files for processing the form data, you can use `require` or `include` statements within your PHP file. 

<?php
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    // Form submitted, process the form data
    $name = $_POST['name'];
    $email = $_POST['email'];
    
    // Include external file for further processing
    require 'process_form.php';
}
?>

<!-- HTML form -->
<form method="post" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>">
    Name: <input type="text" name="name"><br>
    Email: <input type="text" name="email"><br>
    <input type="submit" value="Submit">
</form>

Keywords

PHP form evaluation structure include files external files

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