With the below code we unable to session ingrate please help us how to integrate is there any modification let give modification. Thank you

       <?php session_start();
   include "conn.php";

   include "PHPBB_Login.php";

    echo $_SESSION['username'];

  $data=mysql_query("select * from people where username='".$_SESSION['username']."'");

  $data_data=mysql_fetch_array($data);

   echo $_SESSION['username'];

  $_SESSION['username']=$data_data['username']; 

  echo $_SESSION['username'];

  $phpbbq=mysql_query("select user_id from phpbb_users where username='".$data_data['username']."'");
    $phpbbr=mysql_fetch_array($phpbbq);

    //echo $phpbbr['user_id'];
    $id=$phpbbr['user_id'];
    $phpbb->login($id );
  ?>

    <?


class PHPBB_Login {

    function PHPBB_Login() {
    }

    function login($phpbb_user_id) {
       $id=$phpbb_user_id ;
        global $db, $board_config;
        global $HTTP_COOKIE_VARS, $HTTP_GET_VARS, $SID;

        // Setup the phpbb environment and then
        // run through the phpbb login process

        // You may need to change the following line to reflect
        // your phpBB installation.
        require_once('./phpBB-3.0.7-PL1/phpBB3/config.php');

        define('IN_PHPBB',true);

        // You may need to change the following line to reflect
        // your phpBB installation.
        $phpbb_root_path = "./phpBB-3.0.7-PL1/phpBB3/";

        require_once( $phpbb_root_path . "extension.inc" );
        require_once( $phpbb_root_path . "common.php" );

       // return session_begin($id,$user_ip, PAGE_INDEX, FALSE, TRUE );
       return  session_begin($id,$user_ip, PAGE_INDEX, FALSE, $autologin, '0');
    }

    function logout( $session_id, $phpbb_user_id ) {
        global $db, $lang, $board_config;
        global $HTTP_COOKIE_VARS, $HTTP_GET_VARS, $SID;

        // Setup the phpbb environment and then
        // run through the phpbb login process

        // You may need to change the following line to reflect
        // your phpBB installation.
        require_once( './phpBB-3.0.7-PL1/phpBB3/config.php' );

        define('IN_PHPBB',true);

        // You may need to change the following line to reflect
        // your phpBB installation.
        $phpbb_root_path = "./phpBB-3.0.7-PL1/phpBB3/";

        require_once( $phpbb_root_path . "extension.inc" );
        require_once( $phpbb_root_path . "common.php" );

        session_end( $session_id, $phpbb_user_id );

        // session_end doesn't seem to get rid of these cookies,
        // so we'll do it here just in to make certain.
        setcookie( $board_config[ "cookie_name" ] . "_sid", "", time() - 3600, " " );
        setcookie( $board_config[ "cookie_name" ] . "_mysql", "", time() - 3600, " " );

    }

}

?>