本文实例讲述了PHP实现自动对图片进行滚动显示的方法。分享给大家供大家参考。具体如下：
指定某个图片目录，该程序自动在页面上滚动展示每一张图片，使用方法：
1. 创建一个幻灯片的图像文件夹。2. 删除图像文件夹中的幻灯片。3. 将下面代码编码后，粘贴在一个文本文件中，命名为“index.php”4. 上传文件到一个目录中5. 更换第6和8行为你对应的设置。6. 运行 (使用第4步中设置的URL)
代码如下：复制代码 代码如下:<?/* PHP image slideshow - auto version - PHP5*/// set the absolute path to the directory containing the imagesdefine ("IMGDIR", "/home/devel/public_html/domain.com/public/images/slideshow/");// same but for wwwdefine ("WEBIMGDIR", "/images/slideshow/");// set session name for slideshow "cookie"define ("SS_SESSNAME", "slideshow_sess");// global error variable$err = "";// start img sessionsession_name(SS_SESSNAME);session_start();// init slideshow class$ss = new slideshow($err);if (($err = $ss->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 = $err; } public function init() { // run actions only if img array session var is empty // check if image directory exists if (!$this->dir_exists()) { return "Error retrieving images, missing directory"; } return ""; } public function get_images() { // run actions only if img array session var is empty if (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, $last); } private function dir_exists() { return file_exists(IMGDIR); }}?><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>Slideshow</title> <style type="text/css"> body{margin: 0;padding: 0;font: 100% Verdana, Arial, Helvetica, sans-serif;font-size: 14px;} div#gallery{border: 1px #ccc solid;width: 600px;margin: 40px auto;text-align: center;} div#gallery img{margin: 20px;border: 2px #004694 solid;} div#gallery p{color: #004694;} div#gallery div.pn{padding: 10px;margin: 0 5px;border-top: 1px #ccc solid;} a{color:#333;} a:hover{color:#cc0000;} a.sp{padding-right: 40px;} </style></head><body> <div id="gallery"> <img src="<?=WEBIMGDIR;?><?=$curr;?>" alt="" /> <p><?=$caption;?></p> <div class="pn"> <a href="?img=<?=$first;?>">First</a> | <a href="?img=<?=$prev;?>" class="sp">Previous</a><a href="?img=<?=$next;?>">Next</a> | <a href="?img=<?=$last;?>">Last</a> </div> </div></body></html>
希望本文所述对大家的php程序设计有所帮助。
