i have create a table with alphanumeri id number
but when i want to retreive my image i got this error

kindly help

Code:
<?php
 include "file_constants.php";
 // just so we know it is broken
 error_reporting(E_ALL);
 // some basic sanity checks
 
 
 if(isset($_GET['id']) && is_numeric($_GET['id'])) {
     //connect to the db
     $link = mysql_connect("$host",
...