HTTP Basic authentication in php

http_basic_authentication.php

//For http basic authentication in php
//Just add this code on top before any echo or print in common file
$user = 'user';
$password = 'pass';
if (!($_SERVER['PHP_AUTH_USER'] == $user && $_SERVER['PHP_AUTH_PW'] == $password)) {
    header('WWW-Authenticate: Basic realm="Please enter username and password to access tgis website"');
    header('HTTP/1.0 401 Unauthorized');
    echo '<h1>Unauthorized Access</h1>';
    exit;
}