PHP实现的防止跨站和xss攻击代码【来自阿里云】

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*/$url_arr=array('xss'=>"//=//+///v(?:8|9|//+|///)|//%0acontent//-(?:id|location|type|transfer//-encoding)",);$args_arr=array('xss'=>"[//'///"//;//*//<//>].*//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)",'sql'=>"[^//{//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)",'other'=>"//.//.[///////].*//%00([^0-9a-fA-F]|$)|%00[//'///"//.]");$referer=empty($_SERVER['HTTP_REFERER']) ? array() : array($_SERVER['HTTP_REFERER']);$query_string=empty($_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();    }  }}?>