Question

我一直在寻找限制用户上传“5”文件的方法，如果他们上传更多内容，请回复邮件。我想限制5，因为垃圾邮件发送者和用户想要欺骗系统并将超过5个数据库上传到数据库中。 I found this answer

if(isset($_FILES['file']['name'][5])){
  // Code

}else{

  //exit
}

但是，它不适合我。如果文件大于5，它仍会发送到数据库并跳过检查器。这是我的代码

PHP

 if($_SERVER['REQUEST_METHOD'] =="POST"){


         if(!empty($_POST['price']) && !empty($_POST['description'])){

             if(!ctype_digit($_POST['price'])){

            echo "PRICE ENTERED IS NOT AN INTEGER... PLEASE TRY AGAIN!";
            exit;
        }
            $price = addslashes(trim((int)$_POST['price']));
            $description = addslashes(trim($_POST['description']));
            if(strlen($description) < 15){

                echo "Description field needs to be GREATER than 15 characters!";
                exit;
            }

             if(isset($_FILES['file']['name'][5])){


                 try{

                    // new php data object 
                    $handler = new PDO('mysql:host=127.0.0.1;dbname=magicsever', 'root', '');
                    //ATTR_ERRMODE set to exception
                    $handler->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

                }catch(PDOException $e){
                     die("There was an error connecting to the database");   

                }

                 $query = "INSERT INTO test(name, file)VALUES(:file_name, :file_tmp)";
                 $stmt = $handler->prepare($query);
                 $errors = array();

                 foreach($_FILES['file']['tmp_name'] as $key => $error){

                     if ($error != UPLOAD_ERR_OK) {
                        $errors[] = $_FILES['file']['name'][$key] . ' was not uploaded.';
                        continue;
                    }

                     $file_name = $key.$_FILES['file']['name'][$key];
                     $file_tmp = $_FILES['file']['tmp_name'][$key];

                     try{

                         $stmt->bindParam(':file_name', $file_name, PDO::PARAM_STR);
                         $stmt->bindParam(':file_tmp', $file_tmp, PDO::PARAM_STR);
                         $stmt->execute();

                         $dir = "devFiles";

                         if(is_dir($dir)==false){

                             mkdir($dir, 0700);
                         }

                         if(is_file($dir.'/'.$file_name)==false){

                             move_uploaded_file($file_tmp,$dir.'/'.$file_name);

                         }else{

                            echo '<br><h1 style="color:red;">VALUES MISSING!</h1>';
                            exit;
                         }
                     }catch(PDOException $e){

                         $errors[] = $file_name . 'not saved in db.';
                         echo $e->getMessage();
                     }
                 }

                 echo "pk";
             }else{

                echo "tooo big";
                 exit;
             }

             }else{

             echo '<br><h1 style="color:red;">VALUES MISSING!</h1>';
             exit;

     }



         }

Answer 1

如果超过5，您要执行代码，要检查是否有不超过5个代码，请使用!：

if(!isset($_FILES['file']['name'][5])){

但你可能只算数：

if(count($_FILES['file']['name']) < 6){

Answer 2

您的情况目前正在检查是否存在第6个文件并继续。代替：

if (count($_FILES['file']['name']) <= 5) {
    ...

PHP如何将用户限制为可以上载的特定数量的文件

2 个答案: