帝国利用PHP生成sitemap文件

这个代码可以拿去直接用，但是有一点需要注意，如果网站文章太多了，那就需要修改部分代码，百度好像规定了sitemap里面的链接条数的。太多了不太友好

sitemap代码

<?php  
/*引用文件*/  
require('e/class/connect.php');
require('e/class/db_sql.php');
require('e/data/dbcache/class.php');
/*建立数据库链接 与 实例化类*/  
$link = db_connect();  
$empire=new mysqlquery();  
//header("Content-type:application/xml");
header("Content-type: text/html; charset=utf-8");
$operation = $_GET['operation'];
$current_url = explode('/',$_SERVER['PHP_SELF']);  
$current_script_name = end($current_url);  
if($operation && $operation == "makexml")
{
 $xml = generate_sitemp_xml();
 $result = save_xml('sitemap.xml',$xml);
 if($result)
 {
  echo '生成成功，<a href="sitemap.xml">点此查看</a>'; 
 }
 else
 {
  echo '生成失败，<a href="'.$current_script_name.'">在来一次</a>！'; 
 }
}
else
{
 echo '欢迎使用红穆Sitemap生成工具，请<a href="'.$current_script_name.'?operation=makexml">点此生成</a>！'; 
}


//保存到文件
function save_xml($filename, $text) {
 if (!$filename || !$text)
  return false;
 
   @chmod($filename,0777);
 if ($fp = fopen($filename, "w")) {
  if (@fwrite($fp, $text)) {
   fclose($fp);
   return true;
  } else {
   fclose($fp);
   return false;
  } 
 } 
    return false;
} 
//生成Sitemap XML数据
function generate_sitemp_xml()
{
 global $dbtbpre,$empire;
 
 $xml = '';
 $xml .= '<?xml version="1.0" encoding="utf-8"?>' .PHP_EOL;
 $xml .= '<urlset>' .PHP_EOL;
 $xml .= generate_home_xml();//首页
 $xml .= generate_class_xml();//栏目
 
 $query="select * from {$dbtbpre}ecms_news order by id desc limit 10000";
 $sql=$empire->query($query);
 while($r=$empire->fetch($sql))
 {
  $titleurl=sys_ReturnBqTitleLink($r);
  
  $xml .= '  <url>' .PHP_EOL;
  $xml .= '    <loc>'.$titleurl.'</loc>' .PHP_EOL;
  $xml .= '    <lastmod>'.strftime('%Y-%m-%d',$r['newstime']).'</lastmod>' .PHP_EOL;
  $xml .= '    <changefreq>daily</changefreq>' .PHP_EOL;
  $xml .= '    <priority>0.8</priority>' .PHP_EOL;
  $xml .= '  </url>' .PHP_EOL;
  
 }
 $xml .= '</urlset>' .PHP_EOL; 
 
 return $xml;
}
//生成栏目链接XML数据
function generate_class_xml()
{
 global $dbtbpre,$empire,$class_r;
 $xml = '';
  
 $sql=$empire->query("SELECT * FROM {$dbtbpre}enewsclass WHERE islast=1");
 while($r=$empire->fetch($sql))
 {
  $infor=$empire->fetch1("SELECT newstime FROM {$dbtbpre}ecms_".$class_r[$r[classid]][tbname]." WHERE classid='$r[classid]' ORDER BY newstime DESC LIMIT 1");
  $class_url=sys_ReturnBqClassname($r, 9);
  
  $xml .= '  <url>' .PHP_EOL;
  $xml .= '    <loc>'.$class_url.'</loc>' .PHP_EOL;
  $xml .= '    <lastmod>'.strftime('%Y-%m-%d',time()).'</lastmod>' .PHP_EOL;
  $xml .= '    <changefreq>daily</changefreq>' .PHP_EOL;
  $xml .= '    <priority>0.8</priority>' .PHP_EOL;
  $xml .= '  </url>' .PHP_EOL;
  
 }
 
 return $xml;
}
//生成栏目链接XML数据
function generate_home_xml()
{
global $public_r; 
 $xml = '';
 $xml .= '  <url>' .PHP_EOL;
 $xml .= '    <loc>'.$public_r[newsurl].'</loc>' .PHP_EOL;
 $xml .= '    <lastmod>'.strftime('%Y-%m-%d',time()).'</lastmod>' .PHP_EOL;
 $xml .= '    <changefreq>daily</changefreq>' .PHP_EOL;
 $xml .= '    <priority>0.8</priority>' .PHP_EOL;
 $xml .= '  </url>' .PHP_EOL;
 
 return $xml;
}
/*关闭数据库连接 与 释放类*/  
db_close();  
$empire=null;
?>