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- <?php
- /**
- * 防采集混淆字符串
- *
- * @version $Id: downmix.inc.php 1 9:14 2010年7月6日Z tianya $
- * @package DedeCMS.Libraries
- * @copyright Copyright (c) 2007 - 2020, DesDev, Inc.
- * @license http://help.dedecms.com/usersguide/license.html
- * @link http://www.dedecms.com
- */
-
- /**
- * 混淆字符串内容
- *
- * @access public
- * @param string $body 内容
- * @return string
- */
- if ( ! function_exists('RndString'))
- {
- function RndString(&$body)
- {
- //最大间隔距离(如果在检测不到p标记的情况下,加入混淆字串的最大间隔距离)
- $maxpos = 1024;
-
- //font 的字体颜色
- $fontColor = "#FFFFFF";
-
- //div span p 标记的随机样式
- $st1 = chr(mt_rand(ord('A'),ord('Z'))).chr(mt_rand(ord('a'),ord('z'))).chr(mt_rand(ord('a'),ord('z'))).mt_rand(100,999);
- $st2 = chr(mt_rand(ord('A'),ord('Z'))).chr(mt_rand(ord('a'),ord('z'))).chr(mt_rand(ord('a'),ord('z'))).mt_rand(100,999);
- $st3 = chr(mt_rand(ord('A'),ord('Z'))).chr(mt_rand(ord('a'),ord('z'))).chr(mt_rand(ord('a'),ord('z'))).mt_rand(100,999);
- $st4 = chr(mt_rand(ord('A'),ord('Z'))).chr(mt_rand(ord('a'),ord('z'))).chr(mt_rand(ord('a'),ord('z'))).mt_rand(100,999);
- $rndstyle[1]['value'] = ".{$st1} { display:none; }";
- $rndstyle[1]['name'] = $st1;
- $rndstyle[2]['value'] = ".{$st2} { display:none; }";
- $rndstyle[2]['name'] = $st2;
- $rndstyle[3]['value'] = ".{$st3} { display:none; }";
- $rndstyle[3]['name'] = $st3;
- $rndstyle[4]['value'] = ".{$st4} { display:none; }";
- $rndstyle[4]['name'] = $st4;
- $mdd = mt_rand(1,4);
- $rndstyleValue = $rndstyle[$mdd]['value'];
- $rndstyleName = $rndstyle[$mdd]['name'];
- $reString = "<style> $rndstyleValue </style>\r\n";
-
- //附机标记
- $rndem[1] = 'font';
- $rndem[2] = 'div';
- $rndem[3] = 'span';
- $rndem[4] = 'p';
-
- //读取字符串数据
- $fp = fopen(DEDEDATA.'/downmix.data.php','r');
- $start = 0;
- $totalitem = 0;
-
- while(!feof($fp))
- {
- $v = trim(fgets($fp,128));
- if($start==1)
- {
- if(preg_match("/#end#/i", $v))
- {
- break;
- }
- if($v!='')
- {
- $totalitem++; $rndstring[$totalitem] = preg_replace("/#,/", "", $v);
- }
- }
- if(preg_match("/#start#/i", $v))
- {
- $start = 1;
- }
- }
- fclose($fp);
-
- //处理要防采集的字段
- $bodylen = strlen($body) - 1;
- $prepos = 0;
- for($i=0;$i<=$bodylen;$i++)
- {
- if($i+2 >= $bodylen || $i<50)
- {
- $reString .= $body[$i];
- }
- else
- {
- $ntag = @strtolower($body[$i].$body[$i+1].$body[$i+2]);
- if($ntag=='</p' || ($ntag=='<br' && $i-$prepos>$maxpos) )
- {
- $dd = mt_rand(1,4);
- $emname = $rndem[$dd];
- $dd = mt_rand(1,$totalitem);
- $rnstr = $rndstring[$dd];
- if($emname!='font')
- {
- $rnstr = " <$emname class='$rndstyleName'>$rnstr</$emname> ";
- }
- else
- {
- $rnstr = " <font color='$fontColor'>$rnstr</font> ";
- }
- $reString .= $rnstr.$body[$i];
- $prepos = $i;
- }
- else
- {
- $reString .= $body[$i];
- }
- }
- }
- return $reString;
- }//函数结束
- }
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