How can PHP implement its own authentication mechanisms for specific pages or modules, especially when htaccess may not be sufficient?

PHP can implement its own authentication mechanisms by creating a login system that checks user credentials before allowing access to specific pages or modules. This can be achieved by storing user information in a database, creating login forms, and using sessions to track authenticated users. If htaccess is not sufficient, PHP can handle authentication logic within its code to restrict access based on user authentication status. 

<?php
session_start();

// Check if user is not logged in, redirect to login page
if (!isset($_SESSION['loggedin']) || $_SESSION['loggedin'] !== true) {
    header("Location: login.php");
    exit;
}

// Restricted page content here
?>

Keywords

PHP authentication htaccess modules mechanisms

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