function sitemapxml(){
$user = M('sethouse');//thinkPHP 数据链接
$today = date("Y-m-d",time());
$yesterday = mktime(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'] = '';
}
$content=''.chr(13).'';
$content.='
http://www.xxx.com
'.$today.'
always
0.9

'.chr(13);
foreach($data_array as $data){
$content.=create_item($data);
}
$content.='';
$fp=fopen('sitemap.xml','w+');
fwrite($fp,$content);
fclose($fp);
}
function create_item($data){
$item="\n";
$item.="".$data['loc']."\n";
$item.="".$data['lastmod']."\n";
$item.="".$data['changefreq']."\n";
$item.="".$data['priority']."\n";
$item.="".$data['data']."\n";
$item.="\n";
return $item;
}