<?php  class sqlsafe {      private $getfilter = "'|(and|or)\\b.+?(>|<|=|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);      }  }  ?>