如何使用php按类别订购上传的图片？

I uploaded some images to a MySQL database using a simple form and some php. The form has the following selection for catagory inputs.

<select name="image_ctgy">
<option value="animals">animals</option>
<option value="vegetables">vegetables</option>
<option value="minerals">minerals</option>
</select>

Each image has one of these categories in the MySQL table 'image_ctgy'. Now I want to echo the images in the category animals to my webpage.

I use the following code to get all the images on my webpage:

<?php
/*** Check the $_GET variable ***/
   try    {
          /*** connect to the database ***/
          $dbh = new PDO("mysql:host=;dbname=", '', '');

          /*** set the PDO error mode to exception ***/
          $dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

          /*** The sql statement ***/
          $sql = "SELECT image_id, thumb_height, thumb_width, image_ctgy, image_type, image_name, title FROM testblob";

          /*** prepare the sql ***/
          $stmt = $dbh->prepare($sql);

          /*** exceute the query ***/
          $stmt->execute(); 

          /*** set the fetch mode to associative array ***/
          $stmt->setFetchMode(PDO::FETCH_ASSOC);

          /*** set the header for the image ***/
          foreach($stmt->fetchAll() as $array)
              {
            echo '<div class="thumb" style="width: '.$array['thumb_width'].'px; height: '.$array['thumb_height'].'px;">
            <p class="title">' . $array["title"] . '</p>
            <p><a href="showfile.php?image_id='.$array['image_id'].'">
            <img src="showthumbs.php?image_id='.$array['image_id'].'" alt="'.$array['image_name'].' /">
            </a></p>
            </div>';

        }
   }
     catch(PDOException $e)
        {
        echo $e->getMessage();
        }
     catch(Exception $e)
        {
        echo $e->getMessage();
        }
?>

I think I need an if statement in the foreach loop to check if the image has to catagry Animals. Can anyone help me with this? Thanks

Raveenanigam posted an awnser to my question.

you can change with query with WHERE clause : WHERE category = 'Animal'