后端开发|php教程
PHP,自动,图片,滚动显示,方法
后端开发-php教程
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:
易语言网络验证源码,VScode如何让图形变圆,ubuntu内核bbr,tomcat运行java类,stracy框架爬虫,php采集类snoopy,武汉广告seo推广多少钱,ui下载高清素材的网站有哪些lzw
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:
美容美发行业app源码,ubuntu设置ip无效,tomcat配置服务启动项,爬虫抓数据技术,ftp服务器定时php,建站前seolzw
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)
怎么上传魔方日记源码,Vscode计划任务,Ubuntu错误530,tomcat增加ip限制,cscoket网络爬虫,php压缩html代码,山西seo优化哪家专业,网站自动采集软件,dedecms更改默认模板lzw
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//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 $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);
}
}
?>
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;}
">First | ">Previous">Next | ">Last