程序代码：

<?
    require_once("connect_sql.php");
    $sql="select * from table_2 ";
    $result=mysql_query($sql,$link) or die("failed to display the picture");
    while($row=mysql_fetch_array($result))
{
    $data=base64_decode($row['logo']);
    header("Content-type:   image/jpeg"); 
    echo $data;
}
     //$data=base64_decode($row['logo']);
        //header("Content-type:   image/jpeg"); 
        //echo $data;   

 ?>