image Scaling in php

[chaitanya15385]

please help me in scaling image when displaying from external folder . here is my code. very urgent

if ($news->getString("image_file")) {
             if(file_exists(EXTRAFILE_DIR."/".$news->getString("image_file"))) {
                ?>
                <tr>
                    <td colspan="2">

                    <img src="<?=EXTRAFILE_URL?>/<?=$news->getString("image_file")?>" width="780" height="500" alt="logo">


                    </td>
                </tr>
                <?
            }
        }