PHP从链接显示图像

我试图让我的图像通过链接点击时显示。然而，当我点击链接，它发现图像id显示在url链接ok，但不显示任何图像。你能帮帮我吗?

 <?php
//sets up thisPage          
 $pageSize=10;
  if (isset($_POST["thisPage"])) $thisPage=$_POST["thisPage"];
   else $thisPage=1;

 //selects all distinct expenses that have been uploaded
 $dbQuery="SELECT * FROM images WHERE user_id = '$userID' ";
  $dbResult=mysqli_query($db_connection, $dbQuery) or die(mysqli_error($db_connection));
  echo "<table cellspacing='"5'" class='"recordsTableBG'"> <thead 
  class='"recordsTableHeader'">";
  echo '<tr>     <th>ID</th><th>Amount</th><th>Description</th><th>Filename</th>
   <th>Project ID</th><th>Status</th></tr></thead>';
    echo '<tr class="alternateRowColor">';
   '<tr>';
    while ($dbRow=mysqli_fetch_array($dbResult)){
    echo "<img src = 'uploaded/$image' width = '200' height = '200'>";
  // display row with expense
  echo '<td>'. $dbRow['id'] .'</td>';
 echo '<td>'. $dbRow['user_id']. '</td>';
     echo '<td><a href='.$_SERVER['PHP_SELF'].'?imageid='.$dbRow['id'].'>
Click here to view image</a></td>';
    }
 echo "</table>";
 echo "</form>";

   ?>

    <!-- add submitt button
            close form  -->
       </div>