Setting various environments (development, production) based on the URL

<?php


    define('DEVELOPMENT', 'localhost');
    define('PRODUCTION', '');
    $message = "";
    switch ($_SERVER['SERVER_NAME']) {
      case DEVELOPMENT:
        // Condition for localhost server
        $localhost = "localhost";
        $username = "root";
        $password = "";
        $database = "test";
        break;
    default:
        // live server
        $localhost = "Enter live hostname";
        $username = "Enter live username";
        $password = "Enter live password";
        $database = "Enter live database name";
        break;
    }
$GLOBALS['connection'] = new mysqli($localhost, $username, $password, $database);

if($GLOBALS['connection'])
{
     echo "connected";
}
else{
     echo mysqli_error();
}


?>