百度站点地图sitemap.xml生成代码

function sitemapxml(){
	$user = M('sethouse');//thinkphp 数据链接
	$today = date("Y-m-d",time());
	$yesterday  = mktime(0, 0, 0, date("m")  , date("d")-1, date("Y"));
	$lastweek = strtotime("-1 week");
	$link = M();
	$yesterdayArr = $link->query("select * from pre_sethouse where status=1 and time>$yesterday");//昨天
	$lastweekArr = $link->query("select * from pre_sethouse where  status=1 and time>$lastweek");//上周
	$url = "http://www.xxx.com/House/housecontent/id/";
	foreach($yesterdayArr as $k=>$v){
		$data_array[$k]['loc'] = $url.$v['hid'];
		$data_array[$k]['lastmod'] = $today;
		$data_array[$k]['changefreq'] = 'always';
		$data_array[$k]['priority'] = '0.6';
		$data_array[$k]['data'] = '<display></display>';
	}
	$content='<?xml version="1.0" encoding="UTF-8"?><urlset>'.chr(13).'';
	$content.='<url>
	<loc>http://www.xxx.com</loc>
	<lastmod>'.$today.'</lastmod>
	<changefreq>always</changefreq>
	<priority>0.9</priority>
	<data><display></display></data>
	</url>'.chr(13);
	foreach($data_array as $data){
		$content.=create_item($data);
	}
	$content.='</urlset>';
	$fp=fopen('sitemap.xml','w+');
	fwrite($fp,$content);
	fclose($fp);
}
function create_item($data){
    $item="<url>\n";
    $item.="<loc>".$data['loc']."</loc>\n";
    $item.="<lastmod>".$data['lastmod']."</lastmod>\n";
    $item.="<changefreq>".$data['changefreq']."</changefreq>\n";
    $item.="<priority>".$data['priority']."</priority>\n";
	$item.="<data>".$data['data']."</data>\n";
    $item.="</url>\n";
    return $item;
}