function set_usernick($user, $nickname)
{
include_once '/home/wwwroot/default/zaina/lib/huanxin/Easemob.class.php';
$option = array('client_id' => '*****************************', 'client_secret' => '*****************************', 'org_name' => '*****************************', 'app_name' => '*****************************');
$easemob = new Easemob($option);
$res = $easemob->set_usernick($user, $nickname);
//$res = $easemob->Send_file('kefu',$us,'hi');
return $res;
}