What are the advantages of using PHP to handle logins compared to traditional HTML forms?

Using PHP to handle logins provides several advantages over traditional HTML forms. PHP allows for server-side validation of user input, which helps prevent common security vulnerabilities such as SQL injection and cross-site scripting attacks. Additionally, PHP can securely store user passwords using hashing algorithms, providing an extra layer of protection for sensitive information. PHP also allows for session management, which can help keep track of user authentication status across multiple pages. 

<?php
// PHP code for handling login form submission

// Check if form is submitted
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    // Retrieve user input from form
    $username = $_POST["username"];
    $password = $_POST["password"];

    // Validate user input (e.g. check for empty fields)

    // Securely hash the password
    $hashed_password = password_hash($password, PASSWORD_DEFAULT);

    // Check if username and hashed password match database records
    // Perform necessary authentication logic

    // Start a session and set authentication status
    session_start();
    $_SESSION["authenticated"] = true;

    // Redirect user to a protected page
    header("Location: protected_page.php");
    exit();
}
?>

Keywords

PHP login handling HTML forms authentication security

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