如何使用PHP将网址转换为照片？ [关闭]

I have to insert links to database. But they should be opened as a photo on my web?

        <?php
            if(isset($_SESSION['logged_in']) )
            { 
                $selektimi = 'SELECT titulli ,foto , pershkrimi FROM portofolio';
                $result = mysqli_query($conn, $selektimi) or die ('invalid query:'. mysqli_error($conn));

                    while($row = mysqli_fetch_row($result))
                        {
                            list( $titulli, $foto, $pershkrimi)=$row;
                            echo nl2br('<h2>'.$titulli.'</h2>');
                            echo '<img src="'.$row['$foto'].'">';

                            echo nl2br('<p>'.$pershkrimi.'</p>');
                            echo'<hr>';
                        }
               }
         ?>

<?php
//Connect to DB
//query
<img src="'.$row['url'].'">
//replace url with whatever your column name is
?>