为什么我上传的文件有 2 个file_types?

我在我的消息传递系统中添加了一个上传文件的东西,当我尝试按file_type对文件进行排序时,它永远不会起作用。


这是我的上传文件功能:


<?php

session_start();

      include_once "../backend/messaging-functions.php";

      include_once '../backend/databaseconn.php';


      $errors= array();

      $file_name = $_FILES['file']['name'];

      $file_size = $_FILES['file']['size'];

      $file_tmp = $_FILES['file']['tmp_name'];

      $file_type = $_FILES['file']['type'];

      $file_ext= strtolower(end(explode('.',$file_name)));


      $extensions= array("jpeg","jpg","png","mp4","MP4","MOV","PNG","JPG","mov","JPEG");


      if(in_array($file_ext,$extensions)=== false){

         $errors[]="extension not allowed, please choose a JPEG, PNG or a MP4 file type!";

      }


      if($file_size > 16777216) {

         $errors[]='File size must be at MOST 16 MB!';

      }


      if(empty($errors)==true) {

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

          $fileplace = '../userfiles/'.$file_name;

            if ($file_type == "image/jpg" or "image/jpeg" or "image/png" or "image/PNG" or "image/JPG" or "image/JPEG") {

            $date = date("y-m-d h:i:s");

            $filetype = "image";

            $myId = $_SESSION['user-id'];

            $message = $fileplace;

            $groupId = mysqli_real_escape_string($conn, $_GET['id']);

            addMessage($myId, $groupId, $date, $message, $filetype);

          }

            if ($file_type == "video/mp4" or "video/mpeg4") {

              $date = date("y-m-d h:i:s");

              $filedtype = "video";

              $myId = $_SESSION['user-id'];

              $message = $fileplace;

              $groupId = mysqli_real_escape_string($conn, $_GET['id']);

              addMessage($myId, $groupId, $date, $message, $filedtype);

            }

      }



 ?>

我尝试添加一个exit();在第一个 if 之后的事情,这样它就不会触发两次,而是从不称自己为视频。请帮忙


慕少森
浏览 81回答 1
1回答

UYOU

你在中使用的逻辑是有缺陷的——它总是等同于 true。考虑:if( $file_type==....$file_type='image/jpeg';if( $file_type == "ximage/jpg" or "ximage/jpeg" or "ximage/png" or "ximage/PNG" or "ximage/JPG" or "ximage/JPEG"){&nbsp; &nbsp; echo('# this is Bogus #');}$filetypes=array( 'image/jpg','image/jpeg','image/png','image/gif');if( in_array( strtolower( $file_type ), $filetypes ) )echo '# This is good #;';这将输出# this is Bogus ## This is good #;第一部分显然是错误的 - 使用 etc 不应该验证ximage/jpeg
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