How can one ensure proper authentication and authorization when accessing files on a web server from a local machine using PHP?

Proper authentication and authorization when accessing files on a web server from a local machine using PHP can be ensured by implementing a login system that verifies user credentials and checks permissions before allowing access to files. This can be achieved by creating a login form, validating user input, checking against a database of authorized users, and setting session variables to track user authentication status. 

// Check if user is logged in before accessing files
session_start();

if (!isset($_SESSION['loggedin'])) {
    header('Location: login.php');
    exit;
}

// Add authorization logic here to check user permissions
// For example, check if user has access to specific files or directories

// Proceed with file access logic here
// For example, read or write files based on user permissions

Keywords

authentication authorization web server local machine PHP

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