限制文件上传类型 [英] Limiting file upload type

问题描述

一个简单的问题.有没有一种方法只能在上传时允许txt文件?我环顾四周，我发现的只是text/php，它允许使用PHP.

Simple question. Is there a way to only allow txt files upon uploading? I've looked around and all I find is text/php, which allows PHP.

$uploaded_type=="text/php

推荐答案

使用PHP上传文件时，该文件存储在$ _FILES数组中.在其中有一个名为"type"的密钥，它具有文件EG $_FILES['file']['type']

When you upload a file with PHP its stored in the $_FILES array. Within this there is a key called "type" which has the mime type of the file EG $_FILES['file']['type']

所以要检查它是否是txt文件

So to check it is a txt file you do

if($_FILES['file']['type'] == 'text/plain'){
    //Do stuff with it.
}

在此处进行了很好的解释.另外，不要依赖文件扩展名，这是非常不可靠的.

It's explained very well here. Also, don't rely on file extentions it's very unreliable.

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