cvncpu's LPG

function disp($pid) {        echo "<img src=pic-".$pid.".JPG>";        echo "<br><br>";        if (file_exists("pic-".($pid-1).".JPG")) {        echo "<b><a href=photo.php?pid=".($pid-1).">Previous</a> &nbsp; </b>";        }        if (file_exists("pic-".($pid+1).".JPG")) {        echo "<b><a href=photo.php?pid=".($pid+1).">Next</a></b>";        }}if ($_GET['pid']) {        disp($_GET['pid']);} else {        disp(1);}