php中HTTP_REFERER函数用法实例
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《PHP实例：php中HTTP_REFERER函数用法实例》要点： PHP教程本文实例分析了php中HTTP_REFERER函数用法.分享给大家供大家参考.具体分析如下： PHP教程利用php的http_referer函数来判断用户的来路,这是比较简单的,实例代码如下:
代码如下:
<?php
?? if (isset($_SERVER['HTTP_REFERER'])) { ???? print "The page you were on previously was {$_SERVER['HTTP_REFERER']}<br />"; ?? } else { ???? print "You didn't click any links to get here<br />"; ????? } ??? ?> <a href="refer.php">Click me!</a> 下面是我们让用户不知道我们的来路处理,实例代码如下:
代码如下:
<?php
$host = "www.aspzz.cn"; $referer = "http://".$host; $fp = fsockopen ($host,80,$errno,$errstr,30); if (!$fp){ ??????? echo "$errstr ($errno)<br>;n"; }else{ $request = " GET / HTTP/1.1 Accept: image/gif,image/x-xbitmap,image/jpeg,image/pjpeg,application/x-shockwave-flash,application/vnd.ms-powerpoint,application/vnd.ms-excel,application/msword,*/"."* Referer: http://$host Accept-Language: zh-cn Accept-Encoding: gzip,deflate User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1) Host: $host Connection: Close" ."rnrn"; ? fputs ($fp,"$request"); while (!feof($fp)) { ?? $res[] = fgets($fp,1024); } $html = join("",$res); fclose ($fp); $fp = file_put_contents("123cha.html",$html); echo "done"; } 这不就行了? PHP教程不过很奇怪的是,www.aspzz.cn 的页面抓下来是乱码(除了http头),这是为什么?难道是因为用了gzip之类压缩?
代码如下:
<?php
$host = "www.aspzz.cn"; $html = file_get_contents("http://".$host); $fp = file_put_contents("hao123.html",$html); echo "done"; ?>; 但这样抓的就没问题,再来分析开始抓的http头: PHP教程HTTP/1.1 200 OK Date: Wed,31 Aug 2005 00:59:36 GMT Server: Apache/1.3.27 Cache-Control: max-age=1296000 Expires: Thu,15 Sep 2005 00:59:36 GMT Last-Modified: Mon,29 Aug 2005 13:56:00 GMT Accept-Ranges: bytes Connection: close Content-Type: text/html Content-Encoding: gzip Content-Length: 14567 PHP教程果然有这句,Content-Encoding:gzip,原来压缩了的,长度14567字节了,用第二种办法抓,原来没压缩的html是71143字节,原来file_get_contents还可以自动解压缩. PHP教程php实例二,代码如下:
代码如下:
<?php
$host = '127.0.0.1'; $target = '/2.php'; $referer = ''; //伪造HTTP_REFERER地址 $fp = fsockopen($host,30); if (!$fp){ echo "$errstr($errno)<br />n"; }? else{ $out = " GET $target HTTP/1.1 Host: $host Referer: $referer Connection: Closernrn"; fwrite($fp,$out); while (!feof($fp)){ echo fgets($fp,1024); } fclose($fp); } ?> 另一个2.php文件很简单,只是写上一行读取当前的HTTP_REFERER服务器值的代码即可,如下:
代码如下:
<?php
echo "<hr />"; echo $_SERVER["HTTP_REFERER"]; ?> PHP教程希望本文所述对大家的php程序设计有所赞助. 《PHP实例：php中HTTP_REFERER函数用法实例》是否对您有启发，欢迎查看更多与《PHP实例：php中HTTP_REFERER函数用法实例》相关教程，学精学透。编程之家 52php.cn为您提供精彩教程。 （编辑：李大同） 【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容! |