$xmlfile = 'news/'.date('YmdH').'.xml';
$sourcexml = 'http://www.chinanews.com.cn/rss/scroll-news.xml';
if( !file_exists($xmlfile) ) {
$str = @file($sourcexml) or die('加载文件时出错。');
$fp = fopen($xmlfile,'w') or die('写缓存失败!');
fputs($fp,$str);
fclose($fp);
然后用simplexml读取并输出HTML
$xml = simplexml_load_file($xmlfile);
$c = $xml->channel;
$k = 0;
foreach($c->item as $v) {
$k ++;
echo "
";
后来遇到了一个问题，就是RSS中经常包含有一些GBK的繁体字。google了很多字符集转换方面的文章。得出一个解法：
$str = mb_convert_encoding( join('',$str), "gb2312", "GBK");
这个方法并不能繁体转为简体，会转成一个乱码，但至少能保证simplexml_load_file($xmlfile)执行成功。因为这些繁体字通常出现在描述里
，暂且接受。
再后来遇到另一个问题，描述里出现了形如“中新网12月30日电(闻育e?”的乱码，simplexml_load_file失败。
至此考虑用正则表达式获取标题和链接。（有文章说正则表达式效率可能更好，以后再验证）
代码如下：
$fp = fopen($xmlfile,'r');
if($fp)
{
$data = fread($fp,filesize($xmlfile));
fclose($fp);
preg_match_all(
"/- (.*?)<\/title><link>(.*?)<\/link>/i",$data,$out,PREG_SET_ORDER); <br>foreach($out as $key => $v) <br>{ <br>$v[1] = iconv('gbk','utf-8',$v[1]); <br>echo " <br><div class=\"newsline\">・<a title=\"$v[1]\" href=\"$v[2]\" target=\"_blank\">$v[1]</a></div><br>"; <br>} <br>} <br></div></div><p>以上就是PHP 正则表达式分析RSS的详细内容，更多请关注0133技术站其它相关文章！</p></article><div class="post-actions"><a href="javascript:;" etap="like" class="post-like action action-like" data-pid="0"><i
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