php过滤非法字符类

|<|=|in|like)|\\/\\*.+?\\*\\/|<\\s*script\\b|\\bEXEC\\b|UNION.+?SELECT|UPDATE.+?SET|INSERT\\s+INTO.+?VALUES|(SELECT|DELETE).+?FROM|(CREATE|ALTER|DROP|TRUNCATE)\\s+(TABLE|DATABASE)";  

     private $postfilter = "\\b(and|or)\\b.{1,6}?(=|>|<|\\bin\\b|\\blike\\b)|\\/\\*.+?\\*\\/|<\\s*script\\b|\\bEXEC\\b|UNION.+?SELECT|UPDATE.+?SET|INSERT\\s+INTO.+?VALUES|(SELECT|DELETE).+?FROM|(CREATE|ALTER|DROP|TRUNCATE)\\s+(TABLE|DATABASE)";  

    private $cookiefilter = "\\b(and|or)\\b.{1,6}?(=|>|<|\\bin\\b|\\blike\\b)|\\/\\*.+?\\*\\/|<\\s*script\\b|\\bEXEC\\b|UNION.+?SELECT|UPDATE.+?SET|INSERT\\s+INTO.+?VALUES|(SELECT|DELETE).+?FROM|(CREATE|ALTER|DROP|TRUNCATE)\\s+(TABLE|DATABASE)";  

     /**  

      * 构造函数  

     */ 

     public function __construct() {  

         foreach($_GET as $key=>$value){$this->stopattack($key,$value,$this->getfilter);}  

        foreach($_POST as $key=>$value){$this->stopattack($key,$value,$this->postfilter);}  

         foreach($_COOKIE as $key=>$value){$this->stopattack($key,$value,$this->cookiefilter);}  

     }  

     /**  

      * 参数检查并写日志  

      */ 

     public function stopattack($StrFiltKey, $StrFiltValue, $ArrFiltReq){  

         if(is_array($StrFiltValue))$StrFiltValue = implode($StrFiltValue);  

         if (preg_match("/".$ArrFiltReq."/is",$StrFiltValue) == 1){     

             $this->writeslog($_SERVER["REMOTE_ADDR"]."    ".strftime("%Y-%m-%d %H:%M:%S")."    ".$_SERVER["PHP_SELF"]."    ".$_SERVER["REQUEST_METHOD"]."    ".$StrFiltKey."    ".$StrFiltValue);  

             showmsg('您提交的参数非法,系统已记录您的本次操作！','',0,1);  

         }  

     }  

     /**  

      * SQL注入日志  

      */ 

     public function writeslog($log){  

         $log_path = CACHE_PATH.'logs'.DIRECTORY_SEPARATOR.'sql_log.txt';  

         $ts = fopen($log_path,"a+");  

         fputs($ts,$log."\r\n");  

         fclose($ts);  

     }  

 }  

 ?>