php简单的网站流量统计程序(来源,搜索引擎,ip,关键词)

visited(); //调用统计函数（最好放在公共页面）

//访问量
function visited(){
$now_time = time();
$referer_url = $_SERVER['HTTP_REFERER']; //来自的页面地址
$from_spider = $keywords = '';
if(!empty($referer_url)){
if(strstr($referer_url,'www.baidu.com')){
$referer_url = explode("&",$referer_url);
foreach($referer_url as $val){
if(strstr($val,'wd=')){
$keywords = explode("wd=",$val);
$keywords = $keywords[1];
}
}
$from_spider = '百度';
$keywords = urldecode($keywords);
}elseif(strstr($referer_url,'www.google')){
$referer_url = explode("&",$referer_url);
foreach($referer_url as $val){
if(strstr($val,'q=')){
$keywords = explode("q=",$val);
$keywords = $keywords[1];
}
}
$from_spider = '谷歌';
$keywords = urldecode($keywords);
}
}
//只判断了百度和谷歌的，其他的原理一样
$theData = array(
'access_time' => $now_time,
'access_date' => date("Y-m-d",$now_time),
'access_url' => $_SERVER['REQUEST_URI'],
'referer_url' => $_SERVER['HTTP_REFERER'],
'keywords' => $keywords,
'ip_address' => $_SERVER['REMOTE_ADDR'],
'from_spider' => $from_spider,
);
$sql = "insert into stats (access_time,access_date,access_url,referer_url,keywords,ip_address,from_spider) values ('".$theData['access_time']."','".$theData['access_date']."','".$theData['access_url']."','".$theData['referer_url']."','".$theData['keywords']."','".$theData['ip_address']."','".$theData['from_spider']."')";
echo $sql; exit;mysql_query($sql);
}