عرض الصور علي المتصفح وليس تحميلها

ارجو الافادة

تسليمه بكره

عندما اقوم بالضغط عي زر display اريد ان يقوم بعرض الصورة علي المتصفح

وجربت الكود ده بس لا يعمل

وهذا هو الكود لكن لم يعمل 

<?php
ob_start();
include('connect.php');
$gid = intval($_GET['id']);
if($_REQUEST['delete'] == 'delete'){
$delete =mysql_query("DELETE FROM upload WHERE id ='".$gid."'") or die (mysql_error);
if(isset ($delete)){
echo"<h1> delete is done </h1>";
}
}
if($_REQUEST['disply'] == 'dis'){
 header("Content-type = $filetype"); 
    header("Content-length = $filesize"); 
    header("Content-disposition = attachment = $filename"); 
    echo $content; 
    exit(); 
     
    } 
$q=mysql_query("select * from upload") or die(mysql_error);
while($row=mysql_fetch_assoc($q)){
$id=$row['id'];
echo "<a href='download.php?id=".$id."'>".$row['name'] ."</a>","&nbsp;","&nbsp;","&nbsp;","";
echo"<a href='delete.php?delete=delete&id=".$row['id']."'>delete</a>","&nbsp;","&nbsp;","&nbsp;","&nbsp;";
echo"<a href='delete.php?disply=dis&id=".$row['id']."'>disply</a>","&nbsp;","&nbsp;","&nbsp;","&nbsp;";
echo"<br>";
}

?>

delete.php