本文实例讲述了Yii框架防止sql注入,xss攻击与csrf攻击的方法。分享给大家供大家参考,具体如下:
PHP中常用到的方法有:
/* 防sql注入,xss攻击 (1)*/ function actionClean($str) { $str=trim($str); $str=strip_tags($str); $str=stripslashes($str); $str=addslashes($str); $str=rawurldecode($str); $str=quotemeta($str); $str=htmlspecialchars($str); //去除特殊字符 $str=preg_replace("//|~|!|@|#|$|%|^|&|*|(|)|_|+|{|}|:|<|>|?|[|]|,|.|/|;|'|`|-|=|||/", "" , $str); $str=preg_replace("/s/", "", $str);//去除空格、换行符、制表符 return $str; } //防止sql注入。xss攻击(1) public function actionFilterArr($arr) { if(is_array($arr)){ foreach($arr as $k => $v){ $arr[$k] = $this->actionFilterWords($v); } }else{ $arr = $this->actionFilterWords($arr); } return $arr; } //防止xss攻击 public function actionFilterWords($str) { $farr = array( "/<(/?)(script|i?frame|style|html|body|title|link|meta|object|?|%)([^>]*", "/(<[^>]*)on[a-zA-Z]+s*=([^>]*>)/isU", "/select|insert|update|delete|drop|'|/*|*|+|-|"|../|./|union|into|load_file|outfile|dump/is" ); $str = preg_replace($farr,'',$str); return $str; } //防止sql注入,xss攻击(2) public function post_check($post) { if(!get_magic_quotes_gpc()) { foreach($post as $key=>$val){ $post[$key] = addslashes($val); } } foreach($post as $key=>$val){ //把"_"过滤掉 $post[$key] = str_replace("_", "_", $val); //把"%"过滤掉 $post[$key] = str_replace("%", "%", $val); //sql注入 $post[$key] = nl2br($val); //转换html $post[$key] = htmlspecialchars($val); //xss攻击 } return $post; }
调用:
//防止sql $post=$this->post_check($_POST); //var_dump($post);die; $u_name=trim($post['u_name']); $pwd=trim($post['pwd']); if(empty($u_name)||empty($pwd)) { exit('字段不能非空'); } $u_name=$this->actionFilterArr($u_name); $pwd=$this->actionFilterArr($pwd); //防止sql注入,xss攻击 $u_name=$this->actionClean(Yii::$app->request->post('u_name')); $pwd=$this->actionClean(Yii::$app->request->post('pwd')); $email=$this->actionClean(Yii::$app->request->post('email')); //防止csrf攻击 $session=Yii::$app->session; $csrf_token=md5(uniqid(rand(),TRUE)); $session->set('token',$csrf_token); $session->set('token',time()); //接收数据 if($_POST) { if(empty($session->get('token')) && $session->get('token')!=Yii::$app->request->post('token') && (time()-$session->get('token_time'))>30){ exit('csrf攻击'); } //防止sql .....
(必须放在接收数据之外)
注意:
表单提交值,为防止csrf攻击,控制器中需要加上:
//关闭csrf piblic $enableCsrfValidation = false;
希望本文所述对大家基于Yii框架的PHP程序设计有所帮助。