ThinkPHP 生成 RSS

以下包含了两个类： RSS 和 RSSItem。（推荐存放在 ./extends/rss 目录下)

创建一个新的 RSS 对象，然后用 RSSItems 填充它。支持多媒体（音频/视频文件）。

RSS类：

<?php
namespace rss;

class RSS
{
    var $title;
    var $link;
    var $description;
    var $language = "en-us";
    var $pubDate;
    var $items;
    var $tags;
    var $lastBuildDate;
    var $image;
    var $managingEditor;
    var $ttl;
    var $webMaster;
    var $copyright;

    function __construct()
    {
        $this->items = array();
        $this->tags  = array();
    }

    function addItem($item)
    {
        $this->items[] = $item;
    }

    function setPubDate($when)
    {
        if(strtotime($when) == false)
            $this->pubDate = date("D, d M Y H:i:s ", $when) . "GMT";
        else
            $this->pubDate = date("D, d M Y H:i:s ", strtotime($when)) . "GMT";
    }

    function getPubDate()
    {
        if(empty($this->pubDate))
            return date("D, d M Y H:i:s ") . "GMT";
        else
            return $this->pubDate;
    }

    function addTag($tag, $value)
    {
        $this->tags[$tag] = $value;
    }

    function setLastBuildDate($when)
    {
        if(strtotime($when) == false)
            $this->lastBuildDate = date("D, d M Y H:i:s ", $when) . "GMT";
        else
            $this->lastBuildDate = date("D, d M Y H:i:s ", strtotime($when)) . "GMT";
    }

    function getLastBuildDate()
    {
        if(empty($this->lastBuildDate))
            return date("D, d M Y H:i:s ") . "GMT";
        else
            return $this->lastBuildDate;
    }

    function setImage($value)
    {
        $this->image = $value;
    }

    function setManagingEditor($value)
    {
        $this->managingEditor = $value;
    }

    function setTTL($value)
    {
        $this->ttl = $value;
    }

    function setWebMaster($value)
    {
        $this->webMaster = $value;
    }

    function setCopyright($value)
    {
        $this->copyright = $value;
    }

    function out()
    {
        $out  = $this->header();
        $out .= "<channel>\n";
        $out .= "<title>" . $this->title . "</title>\n";
        $out .= "<link>" . $this->link . "</link>\n";
        $out .= "<description>" . $this->description . "</description>\n";
        $out .= "<language>" . $this->language . "</language>\n";
        $out .= "<pubDate>" . $this->getPubDate() . "</pubDate>\n";
        $out .= "<lastBuildDate>" . $this->getLastBuildDate() . "</lastBuildDate>\n";

        if (!empty($this->image)) {
            $out .= "<image>\n";
            $out .= "<url>" . $this->image . "</url>";
            $out .= "<title>" . $this->title . "</title>";
            $out .= "<link>" . $this->link . "</link>";
            $out .= "</image>\n";
        }

        if (!empty($this->managingEditor)) {
            $out .= "<managingEditor>" . $this->managingEditor . "</managingEditor>\n";
        }

        if (!empty($this->ttl)) {
            $out .= "<ttl>" . $this->ttl . "</ttl>\n";
        }

        if (!empty($this->webMaster)) {
            $out .= "<webMaster>" . $this->webMaster . "</webMaster>\n";
        }

        if (!empty($this->copyright)) {
            $out .= "<copyright>" . $this->copyright . "</copyright>\n";
        }

        foreach($this->tags as $key => $val) $out .= "<$key>$val</$key>\n";
        foreach($this->items as $item) $out .= $item->out();

        $out .= "</channel>\n";

        $out .= $this->footer();

        $out = str_replace("&", "&amp;", $out);

        return $out;
    }

    function serve($contentType = "application/xml")
    {
        $xml = $this->out();
        header("Content-type: $contentType");
        echo $xml;
    }

    function header()
    {
        $out  = '<?xml version="1.0" encoding="utf-8"?>' . "\n";
        $out .= '<rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/">' . "\n";
        return $out;
    }

    function footer()
    {
        return '</rss>';
    }
}

RSSItem类：

<?php
namespace rss;

class RSSItem
{
    var $title;
    var $link;
    var $description;
    var $pubDate;
    var $guid;
    var $tags;
    var $attachment;
    var $length;
    var $mimetype;
    var $author;
    var $category;
    var $comments;
    var $source;

    function __construct()
    {
        $this->tags = array();
        $this->enclosure = array();
    }

    function setSource($value)
    {
        $this->source = $value;
    }

    function setComments($value)
    {
        $this->comments = $value;
    }

    function setCategory($value)
    {
        $this->category = $value;
    }

    function setAuthor($value)
    {
        $this->author = $value;
    }

    function setPubDate($when)
    {
        if(strtotime($when) == false)
            $this->pubDate = date("D, d M Y H:i:s ", $when) . "GMT";
        else
            $this->pubDate = date("D, d M Y H:i:s ", strtotime($when)) . "GMT";
    }

    function getPubDate()
    {
        if(empty($this->pubDate))
            return date("D, d M Y H:i:s ") . "GMT";
        else
            return $this->pubDate;
    }

    function addTag($tag, $value)
    {
        $this->tags[$tag] = $value;
    }

    function out()
    {
        $out = '';
        $out .= "<item>\n";
        $out .= "<title>" . $this->title . "</title>\n";
        $out .= "<link>" . $this->link . "</link>\n";
        $out .= "<description>" . $this->description . "</description>\n";
        $out .= "<pubDate>" . $this->getPubDate() . "</pubDate>\n";

        if (!empty($this->author)) {
            $out .= "<author>" . $this->author . "</author>\n";
        }

        if (!empty($this->category)) {
            $out .= "<category>" . $this->category . "</category>\n";
        }

        if (!empty($this->comments)) {
            $out .= "<comments>" . $this->comments . "</comments>\n";
        }

        if (!empty($this->source)) {
            $out .= "<source>" . $this->source . "</source>\n";
        }

        if($this->attachment != "")
            $out .= "<enclosure url='{$this->attachment}' length='{$this->length}' type='{$this->mimetype}' />\n";

        if(empty($this->guid)) $this->guid = $this->link;
        $out .= "<guid>" . $this->guid . "</guid>\n";

        foreach($this->tags as $key => $val) $out .= "<$key>$val</$key>\n";
        $out .= "</item>\n";
        return $out;
    }

    function enclosure($url, $mimetype, $length)
    {
        $this->attachment = $url;
        $this->mimetype   = $mimetype;
        $this->length     = $length;
    }
}

实例：

        $article = Article::field([
            '*',
        ])->order([
            'm_time'  => 'desc',
            'id'      => 'desc',
        ])->limit(20)->select()->toArray();

        $feed = new RSS();
        $feed->title = $this->config['site_title'];
        $feed->link = request()->domain();
        $feed->description = $this->config['meta_description'];
        $feed->language = 'zh-cn';
        $feed->setWebMaster('1540294142@qq.com');

        foreach ($article as $item) {
            $rssitem = new RSSItem();
            $rssitem->title = $item['title'];
            $rssitem->link = request()->domain() . url('read', ['id' => $item['id']]);
            $rssitem->setPubDate($item['c_time']);
            $rssitem->description = '.$item['desc'].' ]]>';
            $rssitem->setAuthor('1540294142@qq.com');
            $feed->addItem($rssitem);
        }
        return xml($feed->out());