thinkphp 解決頁面刷新表單重複提交的問題

1. 控制器中

   session_start();
   $code =mt_rand(0,1000000);
   $_SESSION['code'] = $code;
   $this->assign('code',$code);

   注：該段代碼應在表單提交判斷的後面

   往html中傳一個session隨機數，並把該隨機數用隱藏input框的形式傳值

2. html頁面中

   <input type="hidden" name="hiddenCode" value="<{$code}>">

3. 在表單提交後的做判斷，若input值與session中的值相等，則可繼續提交，否則不執行提交表單

   session_start();
           if(isset($data['hiddenCode'])){
             if($data['hiddenCode'] == $_SESSION['code']){
               unset($data['hiddenCode']);
               //提交操作
             }
           }

4. 完整代碼：

      public function test(){
           $data = I('post.');
           if($data != null){
             $this->addSubmitform($data);
           }
           session_start();
           $code = mt_rand(0,1000000);
           $_SESSION['code'] = $code;
           $this->assign('code',$code);
           $this->display('.html');
       }
       public function addSubmitform($data){
           session_start();
           if(isset($data['hiddenCode'])){
             if($data['hiddenCode'] == $_SESSION['code']){
               unset($data['hiddenCode']);
               $res1 = M('tableName')->add($data);
               if ($res1 == '') {
                 //上傳失敗
                 return false;
               }
             }
           }
       }

       <form class="ticket-form" action="" method="post">
          Landing Page<input class="form-input page" type="text" name="page"/>
          <input type="hidden" name="hiddenCode" value="<{$code}>">
          <input  type="submit" value="Submit"  >
       </form>