<?php
interface IConnectInfo
{
    const HOST ="localhost";
    const UNAME ="phpWorker";
    const DBNAME = "dpPatt";
    const PW ="easyWay";
    function testConnection();
}
?>

<?php
include_once('IConnectInfoMethod.php');
class ConSQL implements IConnectInfo
{
    //Passing values using scope resolution operator
    private $server=IConnectInfo::HOST;
    private $currentDB= IConnectInfo::DBNAME;
    private $user= IConnectInfo::UNAME;
    private $pass= IConnectInfo::PW;
    public function testConnection()
    {
        $hookup=new mysqli($this->server, $this->user, $this->pass, $this->currentDB);
        if (mysqli_connect_error())
        {
            die('bad mojo');
        }
        print "You're hooked up Ace! <br />" . $hookup->host_info;
        $hookup->close();
   }
}

$useConstant = new ConSQL();
$useConstant->testConnection();
?>