Send msg

function send()
{
  $id=$_POST['id']
  $query = mysqli_query($sql, "SELECT * From Dialogs WHERE id='" . $id . "'");
  $row = mysqli_fetch_array($query);
  $text=$row['msg']."|<font color='red'>".$_POST['name'].":</font> ".$_POST['msg'];
  mysqli_query($sql,"UPDATE Dialogs SET msg=".$text." WHERE id = '".$id."'");
}