这篇文章主要介绍了PHP实现自动对图片进行滚动显示的方法,涉及php操作图片特效的技巧,具有一定参考借鉴价值,需要的朋友可以参考下
本文实例讲述了PHP实现自动对图片进行滚动显示的方法。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:
<? /* PHP image slideshow - auto version - PHP5 */ // set the absolute path to the directory containing the images define ('IMGDIR', '/home/devel/public_html/domain.com/public/images/slideshow/'); // same but for www define ('WEBIMGDIR', '/images/slideshow/'); // set session name for slideshow "cookie" define ('SS_SESSNAME', 'slideshow_sess'); // global error variable $err = ''; // start img session session_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, $last); } private function dir_exists() { return file_exists(IMGDIR); } } ?>
<!DOCTYPE html > <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>Slideshow</title> <style type="text/css"> body{margin: 0;padding: 0;font: 100% Verdana, Arial, Helvetica, sans-serif;font-size: 14px;} p#gallery{border: 1px #ccc solid;width: 600px;margin: 40px auto;text-align: center;} p#gallery img{margin: 20px;border: 2px #004694 solid;} p#gallery p{color: #004694;} p#gallery p.pn{padding: 10px;margin: 0 5px;border-top: 1px #ccc solid;} a{color:#333;} a:hover{color:#cc0000;} a.sp{padding-right: 40px;} </style> </head> <body> <p id="gallery"> <img src="<?=WEBIMGDIR;?><?=$curr;?>" alt="" /> <p><?=$caption;?></p> <p class="pn"> <a href="?img=<?=$first;?>">First</a> | <a href="?img=<?=$prev;?>" class="sp">Previous</a><a href="?img=<?=$next;?>">Next</a> | <a href="?img=<?=$last;?>">Last</a> </p> </p> </body> </html>
总结:以上就是本篇文的全部内容,希望能对大家的学习有所帮助。
相关推荐:
以上是PHP自动在页面上滚动展示图片的方法的详细内容。更多信息请关注PHP中文网其他相关文章!