rettive values after submit using get method. 

here is the code to rettive values using get mothod after a post back using submit

<?php



if ($_SERVER['REQUEST_METHOD'] == 'GET') {

  $id =  $_GET['id'];
  $background = $_GET['background'];
  $url= $_GET['url'];
  $wpdb->update( 'wordpress_background', array( 'background' => $background, 'url' => $url ), array( 'id' => $id ), array( '%s', '%s' ), array( '%s' ) );
  }



  ?>