function connect_selct_db($host,$username,$password,$database_name){
        $mysql_host = ($host != "") ? $host : "localhost";
        $mysql_user = ($username != "") ? $username : "root";
        $mysql_pwd = ($password != "") ? $password : "";
        $database_name = ($database_name != "") ? $database_name : "production";

        $link = mysqli_connect("$mysql_host","$mysql_user","$mysql_pwd") or die("Unable to connect to Host");
        mysqli_select_db($link,"production");
        return $link;
    }

function execQuery($query) // function to execute queries
    {
        $exexQry = mysqli_query($link,$query);

        return $exexQry;
    }