<?php  if (mysqli_num_rows($result) > 0) {
         $result =  mysqli_query("SELECT idMessage, name, telefone, mensagem FROM Messages where Messages.idUser =  '$idUser' ");
          while($row = mysql_fetch_array($result)) :
            $id  = $row["idMessage"];
            $name = $row["name"];
            $mensagem = $row["mensagem"];
          endwhile;
       } else {
            echo "0 results";
          }
      ?>
      <span><?php  echo $id ?></span>
      <span><?php  echo $name ?></span>
      <span><?php  echo $mensagem ?></span>