Help with While fetch loop

[kemnet]

Hello, i have a query that returns multiple results but in my php query it only returns the first result...ive been checking google on while loops but still havent gotten it to work...would love if someone could look at it...thanks

//   while ($result= mysql_fetch_array($stmt)){

     while ($stmt->fetch()) {
              break;
       
         //   $stmt->close();


            
  
            // Return unlock code, encoded with JSON
            $result[] = array(
       "l_name"=>$l_name,
           "f_name"=>$f_name, 
       "birth"=>$birth,
"expires"=>$expires, 

);       
         
           
             
     

            sendResponse(200, json_encode($result));
            return true;
       
        sendResponse(400, 'Invalid request');
        return false

[PFMaBiSmAd]

If you are using mysqli prepared statements, there's an example in the manual that shows how to loop over the result set - http://php.net/manual/en/mysqli-stmt.fetch.php