What are the limitations of using PHP and HTML alone for form submission and processing?

When using PHP and HTML alone for form submission and processing, one limitation is the lack of validation for user input. Without proper validation, the form data can be vulnerable to security risks and errors. To address this, server-side validation should be implemented to ensure that the data submitted is accurate and secure. 

<?php

if ($_SERVER["REQUEST_METHOD"] == "POST") {
    // Validate form data
    $name = $_POST["name"];
    $email = $_POST["email"];
    
    // Check if name is not empty
    if (empty($name)) {
        echo "Name is required";
    }
    
    // Check if email is a valid email address
    if (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
        echo "Invalid email format";
    }
    
    // Process form data if validation passes
    // Additional processing code here
}

?>

Keywords

PHP HTML form submission limitations processing

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