PHP防SQL注入的一个类
时间：2021-07-01 10:21:17
帮助过：15人阅读
- 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);
- }
- }
- ?>
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PHP, SQL
