经常一些代码会限制访客的refer及ip

比如投票为了防止刷票，会限制ip

比如网站为了防止爬虫爬取网站内容，会限制refer

其实refer和ip都可以伪造，并且ip无须有效

<?php function ip()
{
$ip_long = array(
array('607649792', '608174079'), // 36.56.0.0-36.63.255.255
array('1038614528', '1039007743'), // 61.232.0.0-61.237.255.255
array('1783627776', '1784676351'), // 106.80.0.0-106.95.255.255
array('2035023872', '2035154943'), // 121.76.0.0-121.77.255.255
array('2078801920', '2079064063'), // 123.232.0.0-123.235.255.255
array('-1950089216', '-1948778497'), // 139.196.0.0-139.215.255.255
array('-1425539072', '-1425014785'), // 171.8.0.0-171.15.255.255
array('-1236271104', '-1235419137'), // 182.80.0.0-182.92.255.255
array('-770113536', '-768606209'), // 210.25.0.0-210.47.255.255
array('-569376768', '-564133889'), // 222.16.0.0-222.95.255.255
);
$rand_key = mt_rand(0, 9);
return $ip = long2ip(mt_rand($ip_long[$rand_key][0], $ip_long[$rand_key][1]));
}
function gethtml($urlc,$refer,$qingqiuip){
$ch = curl_init($urlc);
$header = array(
'CLIENT-IP:'.$qingqiuip,
'X-FORWARDED-FOR:'.$qingqiuip,
);
curl_setopt($ch,CURLOPT_HTTPHEADER, $header);
curl_setopt($ch,CURLOPT_REFERER, $refer);
curl_setopt($ch,CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch,CURLOPT_USERAGENT,'Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.0; Trident/5.0)');
curl_setopt($ch,CURLOPT_FOLLOWLOCATION,1);
curl_setopt($ch,CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch,CURLOPT_BINARYTRANSFER, 1);
curl_setopt($ch,CURLOPT_TIMEOUT,30);
$data=curl_exec($ch);
curl_close($ch);
return $data;
}
$url="http://www.test.cn/check.php";
$urlcode = gethtml($url,"http://www.csdn.net",ip());
echo $urlcode;

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