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：
<?<br />/*<br /> PHP image slideshow - auto version - PHP5<br />*/<br />// set the absolute path to the directory containing the images<br />define ('IMGDIR', '/home/devel/public_html/domain.com/public/images/slideshow/');<br />// same but for www<br />define ('WEBIMGDIR', '/images/slideshow/');<br />// set session name for slideshow "cookie"<br />define ('SS_SESSNAME', 'slideshow_sess');<br />// global error variable<br />$err = '';<br />// start img session<br />session_name(SS_SESSNAME);<br />session_start();<br />// init slideshow class<br />$ss = new slideshow($err);<br />if (($err = $ss->init()) != '')<br />{<br /> header('HTTP/1.1 500 Internal Server Error');<br /> echo $err;<br /> exit();<br />}<br />// get image files from directory<br />$ss->get_images();<br />// set variables, done.<br />list($curr, $caption, $first, $prev, $next, $last) = $ss->run();<br />/*<br /> slideshow class, can be used stand-alone<br />*/<br />class slideshow<br />{<br /> private $files_arr = NULL;<br /> private $err = NULL;<br /> public function __construct(&$err)<br /> {<br /> $this->files_arr = array();<br /> $this->err = $err;<br /> }<br /> public function init()<br /> {<br /> // run actions only if img array session var is empty<br /> // check if image directory exists<br /> if (!$this->dir_exists())<br /> {<br /> return 'Error retrieving images, missing directory';<br /> }<br /> return '';<br /> }<br /> public function get_images()<br /> {<br /> // run actions only if img array session var is empty<br /> if (isset($_SESSION['imgarr']))<br /> {<br /> $this->files_arr = $_SESSION['imgarr'];<br /> }<br /> else<br /> {<br /> if ($dh = opendir(IMGDIR))<br /> {<br /> while (false !== ($file = readdir($dh)))<br /> {<br /> if (preg_match('/^.*\.(jpg|jpeg|gif|png)$/i', $file))<br /> {<br /> $this->files_arr[] = $file;<br /> }<br /> }<br /> closedir($dh);<br /> }<br /> $_SESSION['imgarr'] = $this->files_arr;<br /> }<br /> }<br /> public function run()<br /> {<br /> $curr = 1;<br /> $last = count($this->files_arr);<br /> if (isset($_GET['img']))<br /> {<br /> if (preg_match('/^[0-9]+$/', $_GET['img'])) $curr = (int) $_GET['img'];<br /> if ($curr $last) $curr = 1;<br /> }<br /> if ($curr <= 1)<br /> {<br /> $prev = $curr;<br /> <span style="color:transparent">/本文来源gaodai#ma#com搞*!代#%^码网%</span><sub>搞代gaodaima码</sub> $next = $curr + 1;<br /> }<br /> else if ($curr >= $last)<br /> {<br /> $prev = $last - 1;<br /> $next = $last;<br /> }<br /> else<br /> {<br /> $prev = $curr - 1;<br /> $next = $curr + 1;<br /> }<br /> // line below sets the caption name...<br /> $caption = str_replace('-', ' ', $this->files_arr[$curr - 1]);<br /> $caption = str_replace('_', ' ', $caption);<br /> $caption = preg_replace('/\.(jpe?g|gif|png)$/i', '', $caption);<br /> $caption = ucfirst($caption);<br /> return array($this->files_arr[$curr - 1], $caption, 1, $prev, $next, $last);<br /> }<br /> private function dir_exists()<br /> {<br /> return file_exists(IMGDIR);<br /> }<br />}<br />?><br /><br /><br /><br /> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><br /> <title>Slideshow</title><br /> <style type="text/css"><br /> body{margin: 0;padding: 0;font: 100% Verdana, Arial, Helvetica, sans-serif;font-size: 14px;}<br /> div#gallery{border: 1px #ccc solid;width: 600px;margin: 40px auto;text-align: center;}<br /> div#gallery img{margin: 20px;border: 2px #004694 solid;}<br /> div#gallery p{color: #004694;}<br /> div#gallery div.pn{padding: 10px;margin: 0 5px;border-top: 1px #ccc solid;}<br /> a{color:#333;}<br /> a:hover{color:#cc0000;}<br /> a.sp{padding-right: 40px;}<br /> </style><br /><br /><body><br /> <div id="gallery"><br /> " alt="" /><br /> <p>
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