晓哥自留代码 特殊用途 看懂的用

function ip(){ if(getenv('HTTP_CLIENT_IP') && strcasecmp(getenv('HTTP_CLIENT_IP'), 'unknown')){ $ip = getenv('HTTP_CLIENT_IP');
}elseif(getenv('HTTP_X_FORWARDED_FOR') && strcasecmp(getenv('HTTP_X_FORWARDED_FOR'), 'unknown')){ $ip = getenv('HTTP_X_FORWARDED_FOR');
}elseif(getenv('REMOTE_ADDR') && strcasecmp(getenv('REMOTE_ADDR'), 'unknown')){ $ip = getenv('REMOTE_ADDR');
}elseif(isset($_SERVER['REMOTE_ADDR']) && $_SERVER['REMOTE_ADDR'] && strcasecmp($_SERVER['REMOTE_ADDR'], 'unknown')){ $ip = $_SERVER['REMOTE_ADDR'];
} return preg_match("/[\d\.]{7,15}/", $ip, $matches) ? $matches[0] : 'unknown';
}

function bh($str11){
$str22=['河南','北京'];
foreach ($str22 as $v){
if(strpos($str11,$v)!==false){
return 1;
break;
}
}
return 0;
}

$ip = ip();

$url = 'http://whois.pconline.com.cn/jsFunction.jsp?callback=jsShow&qq-pf-to=pcqq.c2c&ip='.$ip;
$res = file_get_contents($url);

$res = iconv("gb2312", "utf-8//IGNORE",$res);


if(bh($res)){
echo '';
die;
}