PHP实现防止跨站和xss攻击实例代码

require_once('waf.php');

<?php
/*云体检通用漏洞防护补丁v1.1
更新时间：2013-05-25
功能说明：防护XSS,SQL,代码执行，文件包含等多种高危漏洞
*/
$url_arr=array(
&#39;xss&#39;=>"\\=\\+\\/v(?:8|9|\\+|\\/)|\\%0acontent\\-(?:id|location|type|transfer\\-encoding)",
);
$args_arr=array(
&#39;xss&#39;=>"[\\&#39;\\\"\\;\\*\\<\\>].*\\bon[a-zA-Z]{3,15}[\\s\\r\\n\\v\\f]*\\=|\\b(?:expression)\\(|\\<script[\\s\\\\\\/]|\\<\\!\\[cdata\\[|\\b(?:eval|alert|prompt|msgbox)\\s*\\(|url\\((?:\\#|data|javascript)",
&#39;sql&#39;=>"[^\\{\\s]{1}(\\s|\\b)+(?:select\\b|update\\b|insert(?:(\\/\\*.*?\\*\\/)|(\\s)|(\\+))+into\\b).+?(?:from\\b|set\\b)|[^\\{\\s]{1}(\\s|\\b)+(?:create|delete|drop|truncate|rename|desc)(?:(\\/\\*.*?\\*\\/)|(\\s)|(\\+))+(?:table\\b|from\\b|database\\b)|into(?:(\\/\\*.*?\\*\\/)|\\s|\\+)+(?:dump|out)file\\b|\\bsleep\\([\\s]*[\\d]+[\\s]*\\)|benchmark\\(([^\\,]*)\\,([^\\,]*)\\)|(?:declare|set|select)\\b.*@|union\\b.*(?:select|all)\\b|(?:select|update|insert|create|delete|drop|grant|truncate|rename|exec|desc|from|table|database|set|where)\\b.*(charset|ascii|bin|char|uncompress|concat|concat_ws|conv|export_set|hex|instr|left|load_file|locate|mid|sub|substring|oct|reverse|right|unhex)\\(|(?:master\\.\\.sysdatabases|msysaccessobjects|msysqueries|sysmodules|mysql\\.db|sys\\.database_name|information_schema\\.|sysobjects|sp_makewebtask|xp_cmdshell|sp_oamethod|sp_addextendedproc|sp_oacreate|xp_regread|sys\\.dbms_export_extension)",
&#39;other&#39;=>"\\.\\.[\\\\\\/].*\\%00([^0-9a-fA-F]|$)|%00[\\&#39;\\\"\\.]");
$referer=empty($_SERVER[&#39;HTTP_REFERER&#39;]) ? array() : array($_SERVER[&#39;HTTP_REFERER&#39;]);
$query_string=empty($_SERVER["QUERY_STRING"]) ? array() : array($_SERVER["QUERY_STRING"]);
check_data($query_string,$url_arr);
check_data($_GET,$args_arr);
check_data($_POST,$args_arr);
check_data($_COOKIE,$args_arr);
check_data($referer,$args_arr);
function W_log($log)
{
  $logpath=$_SERVER["DOCUMENT_ROOT"]."/log.txt";
  $log_f=fopen($logpath,"a+");
  fputs($log_f,$log."\r\n");
  fclose($log_f);
}
function check_data($arr,$v) {
 foreach($arr as $key=>$value)
 {
  if(!is_array($key))
  { check($key,$v);}
  else
  { check_data($key,$v);}
  if(!is_array($value))
  { check($value,$v);}
  else
  { check_data($value,$v);}
 }
}
function check($str,$v)
{
  foreach($v as $key=>$value)
  {
  if (preg_match("/".$value."/is",$str)==1||preg_match("/".$value."/is",urlencode($str))==1)
    {
      //W_log("<br>IP: ".$_SERVER["REMOTE_ADDR"]."<br>时间: ".strftime("%Y-%m-%d %H:%M:%S")."<br>页面:".$_SERVER["PHP_SELF"]."<br>提交方式: ".$_SERVER["REQUEST_METHOD"]."<br>提交数据: ".$str);
      print "您的提交带有不合法参数,谢谢合作";
      exit();
    }
  }
}
?>