PHP 实现RSS订阅类

<?phpclass RSS{ /** +---------------------------------------------------------- * RSS频道名 +---------------------------------------------------------- */ protected $channel_title = ’’; /** +---------------------------------------------------------- * RSS频道链接 +---------------------------------------------------------- */ protected $channel_link = ’’; /** +---------------------------------------------------------- * RSS频道描述 +---------------------------------------------------------- */ protected $channel_description = ’’; /** +---------------------------------------------------------- * RSS频道使用的小图标的URL +---------------------------------------------------------- */ protected $channel_imgurl = ’’; /** +---------------------------------------------------------- * RSS频道所使用的语言 +---------------------------------------------------------- */ protected $language = ’zh_CN’; /** +---------------------------------------------------------- * RSS文档创建日期，默认为今天 +---------------------------------------------------------- */ protected $pubDate = ’’; protected $lastBuildDate = ’’; protected $generator = ’YBlog RSS Generator’; /** +---------------------------------------------------------- * RSS单条信息的数组 +---------------------------------------------------------- */ protected $items = array(); /** +---------------------------------------------------------- * 构造函数 +---------------------------------------------------------- * @access public +---------------------------------------------------------- * @param string $title RSS频道名 * @param string $link RSS频道链接 * @param string $description RSS频道描述 * @param string $imgurl RSS频道图标 +---------------------------------------------------------- */ public function __construct($title, $link, $description, $imgurl = ’’) {$this->channel_title = $title;$this->channel_link = $link;$this->channel_description = $description;$this->channel_imgurl = $imgurl;$this->pubDate = Date(’Y-m-d H:i:s’, time());$this->lastBuildDate = Date(’Y-m-d H:i:s’, time()); } /** +---------------------------------------------------------- * 设置私有变量 +---------------------------------------------------------- * @access public +---------------------------------------------------------- * @param string $key 变量名 * @param string $value 变量的值 +---------------------------------------------------------- */ public function Config($key,$value) {$this->{$key} = $value; } /** +---------------------------------------------------------- * 添加RSS项 +---------------------------------------------------------- * @access public +---------------------------------------------------------- * @param string $title 日志的标题 * @param string $link 日志的链接 * @param string $description 日志的摘要 * @param string $pubDate 日志的发布日期 +---------------------------------------------------------- */ function AddItem($title, $link, $description, $pubDate) {$this->items[] = array(’title’ => $title, ’link’ => $link, ’description’ => $description, ’pubDate’ => $pubDate); } /** +---------------------------------------------------------- * 输出RSS的XML为字符串 +---------------------------------------------------------- * @access public +---------------------------------------------------------- * @return string +---------------------------------------------------------- */ public function Fetch() {$rss .= '<?xml version='1.0' encoding='utf-8' ?>rn';$rss .= '<rss version='2.0'>rn';$rss .= '<channel>rn';$rss .= '<title><![CDATA[{$this->channel_title}]]></title>rn';$rss .= '<description><![CDATA[{$this->channel_description}]]></description>rn';$rss .= '<link>{$this->channel_link}</link>rn';$rss .= '<language>{$this->language}</language>rn'; if (!empty($this->pubDate)) $rss .= '<pubDate>{$this->pubDate}</pubDate>rn';if (!empty($this->lastBuildDate)) $rss .= '<lastBuildDate>{$this->lastBuildDate}</lastBuildDate>rn';if (!empty($this->generator)) $rss .= '<generator>{$this->generator}</generator>rn'; $rss .= '<ttl>5</ttl>rn'; if (!empty($this->channel_imgurl)) { $rss .= '<image>rn'; $rss .= '<title><![CDATA[{$this->channel_title}]]></title>rn'; $rss .= '<link>{$this->channel_link}</link>rn'; $rss .= '<url>{$this->channel_imgurl}</url>rn'; $rss .= '</image>rn';} for ($i = 0; $i < count($this->items); $i++) { $rss .= '<item>rn'; $rss .= '<title><![CDATA[{$this->items[$i][’title’]}]]></title>rn'; $rss .= '<link>{$this->items[$i][’link’]}</link>rn'; $rss .= '<description><![CDATA[{$this->items[$i][’description’]}]]></description>rn'; $rss .= '<pubDate>{$this->items[$i][’pubDate’]}</pubDate>rn'; $rss .= '</item>rn';} $rss .= '</channel>rn</rss>';return $rss; } /** +---------------------------------------------------------- * 输出RSS的XML到浏览器 +---------------------------------------------------------- * @access public +---------------------------------------------------------- * @return void +---------------------------------------------------------- */ public function Display() {header('Content-Type: text/xml; charset=utf-8');echo $this->Fetch();exit; }}

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