Would really appreciate it if someone could point me in the right direction.

I am starting to learn PHP again as I have not touched it for years.

Below is a snippet of code I have wrote for a Message System.

```
<?php

$stmt = $user_home->runQuery("SELECT * FROM tbl_messages WHERE recipientID=:uid");
$stmt->execute(array(":uid"=>$_SESSION['userSession']));
while ($qryMessages = $stmt->fetch(PDO::FETCH_ASSOC))

    {
    $mID = $qryMessages['msgID'];
    $mTitle = $qryMessages['msgTitle'];

        echo "<td><a href='?read&mID=$mID'>" . $mTitle . "</a></td>";
    }

?>

```

Some HTML here etc....

```
<?php 

if(isset($_GET['read&mID=' . $mID]))
 {
    echo $mID
 }
?>  

```

I want to be able to show the message on the same page by using isset() but cannot seem to pass the $mID variable to it when its clicked, I keep receiving this error message: 

> 
> **Notice: Undefined variable: mID in D:\xampp\htdocs\development\template\home\messages.php on line 234**
> 
> 
> 

Any feedback would be greatly appreciated.