Having multiple where statements in a MySQL prepared statements class

[matt25]

Hi I am adapting Jeffery Ways Mysql class to accept multiple where statements however I have got stuck on the final hurdle.
It is when I try to do the bind_results() and I pass in the parameter types and the parameters. Here is that part of the code:

if ($this->_where)
            $values = array_values($this->_where);

     $str = "'";
         $str .= implode('\', \'', $values);
        $str .= "'";
        // echo $str;
     $count = count($this->_where);

     foreach($this->_where as $key => $value){
         $key = $value;
     }
     $user = 'matt25';
     $pass = '6722853cacc4a9649dc75abc852f23c35b1f75cb';

     $stmt->bind_param($this->_paramTypeList, $user, $pass);
  }

It works how it is by setting the parameters as variables, but that obviously isn't practical. as you can see I also tried to make a string with the values from the array which brought up the error:
Warning: mysqli_stmt::bind_param() [mysqli-stmt.bind-param]: Number of elements in type definition string doesn't match number of bind variables in C:\wamp\www\trick_tips\admin\includes\MysqlDb.php on line 260,

the same as when I try to put the array into there.

So I need some way of setting each value in the array as a variable to then put into the function, or another Idea that I have completely missed.

Any help would be much appreciated.

Cheers,
Matt