PHP automatically scrolling the image-PHP source code

PHP automatically scrolls the image

Slide. php

 init()) != ''){header('HTTP/1.1 500 Internal Server Error');echo $err;exit();}// get image files from directory$ss->get_images();// set variables, done.list($curr, $caption, $first, $prev, $next, $last) = $ss->run();/*slideshow class, can be used stand-alone*/class slideshow{private $files_arr = NULL;private $err = NULL;public function __construct(&$err){$this->files_arr = array();$this->err = $err;}public function init(){// run actions only if img array session var is empty// check if image directory existsif (!$this->dir_exists()){return 'Error retrieving images, missing directory';}return '';}public function get_images(){// run actions only if img array session var is emptyif (isset($_SESSION['imgarr'])){$this->files_arr = $_SESSION['imgarr'];}else{if ($dh = opendir(IMGDIR)){while (false !== ($file = readdir($dh))){if (preg_match('/^.*\.(jpg|jpeg|gif|png)$/i', $file)){$this->files_arr[] = $file;}}closedir($dh);}$_SESSION['imgarr'] = $this->files_arr;}}public function run(){$curr = 1;$last = count($this->files_arr);if (isset($_GET['img'])){if (preg_match('/^[0-9]+$/', $_GET['img'])) $curr = (int)  $_GET['img'];if ($curr <= 0 || $curr > $last) $curr = 1;}if ($curr <= 1){$prev = $curr;$next = $curr + 1;}else if ($curr >= $last){$prev = $last - 1;$next = $last;}else{$prev = $curr - 1;$next = $curr + 1;}// line below sets the caption name...$caption = str_replace('-', ' ', $this->files_arr[$curr - 1]);$caption = str_replace('_', ' ', $caption);$caption = preg_replace('/\.(jpe?g|gif|png)$/i', '', $caption);$caption = ucfirst($caption);return array($this->files_arr[$curr - 1], $caption, 1, $prev, $next, $last);}private function dir_exists(){return file_exists(IMGDIR);}}?>    
     Slideshow    
    
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