Question

the following is the class i tried to develop in oo way in php but as a begginer in php oo i am getting and error message which i do not know how to solve. please point out the fault thanks.

class MySQLi_DB  extends mysqli {
    private static $_instance = null;


    private function __construct($db="test",$host="localhost", $user="root", $pass="") 
    {

        parent::__construct($host, $user, $pass, $db);
        if (mysqli_connect_error()) {
            die('Connect Error (' . mysqli_connect_errno() . ') '
                    . mysqli_connect_error());
        }
    }

    static public function getDB()
    {
        if(self::$_instance == null)
        {
            self::$_instance = new MySQLi_DB();
        }
        return self::$_instance;

    }

    public function select($sql)
    {
        $res =  $this->query($sql);
        return $res->fetch_all();


    }
}

i instantiate the object as below

require_once 'MySQLi_DB.php';
        $db = MySQLi_DB::getDB();
       $data =  $db->select("select * from cms");

and the error is below

Fatal error: Call to undefined method
mysqli_result::fetch_all() in
D:\wamp\www\Driver\MySQLi_DB.php on
line 39

Answer 1

According to this page mysqli_result::fetch_all() is only available when the MySQL native driver is installed. Please ensure that it is installed and enabled for you configuration.