php文件上传，如何限制文件上传类型 [英] php file upload, how to restrict file upload type

问题描述

我有以下的代码来检查（简历和参考信上传匹配所需的类型（pdf或doc或docx）和大小（小于400 kb）

<$ p $ b $ //检查文件扩展名和大小
$ resume =（$ _FILES ['resume'] ['name']）;
$ reference =（$ _FILES [引用'] ['name']）;
$ ext = strrchr（$ resume，。）;
$ ext1 = strrchr（$ reference，。）;
if ！（$ _ FILES [resume] [type] ==application / doc）
||（$ _FILES [resume] [type] ==application / docx）
||（$ _FILES [resume] [type] ==application / pdf））
&&（（$ _FILES [reference] [type] ==application / doc）
||（$ _FILES [reference] [type] ==application / docx）
||（$ _FILES [reference] [ （$ ext ==.pdf）||（$ ext ==.doc）||（$ ext =.pdf）==application / pdf）
&& =.docx））
&&（（$ ext1 ==.pdf）||（$ ext1 ==.doc）||（$ ext1 ==.docx））
&& （$ _FILES [resume] [size]< 400000）//接受高达500 kb
&& （$ _FILES [reference] [size]< 400000））{

stop user} else {允许上传文件}
pre>

这不是按照要求工作，甚至可以通过txt文件的大小限制来检查是不是正在检查，有什么问题呢？

感谢，

解决方案

下面只是使用mime类型来验证文件，然后检查两者的大小。有关大多数MIME类型的列表，请参阅此处或Google。

 函数allowed_file（）{
 
 //将允许的MIME类型的文件添加到'允许'array 
 $ allowed = array（'application / doc'，'application / pdf'，'another / type'）; 
 
 //检查上传的文件类型是否在上面的数组中（因此有效）
 if（in_array（$ _ FILES ['resume'] ['type']，$ allowed）in_array $ _FILES ['reference'] ['type']，$ allowed））{
 
 //如果找到文件类型允许的类型，继续检查文件大小：
 
 if $ _FILES [resume] [size]< 400000 AND $ _FILES [reference] [size]< 400000）{
 
 //如果两个文件都小于给定的大小限制，允许上传
 //开始filemove在这里.... 
 
} 
 
} 
 
} 
  code> 




I have the following code to check if (resume and reference letter uploaded match desired type (pdf OR doc OR docx) and size (less than 400 kb)

//check file extension and size
         $resume= ($_FILES['resume']['name']); 
         $reference= ($_FILES['reference']['name']); 
         $ext = strrchr($resume, ".");
         $ext1 = strrchr($reference, ".");
        if (!(($_FILES["resume"]["type"] == "application/doc")
        || ($_FILES["resume"]["type"] == "application/docx")
        || ($_FILES["resume"]["type"] == "application/pdf" ))
         && (($_FILES["reference"]["type"] == "application/doc")
        || ($_FILES["reference"]["type"] == "application/docx")
        || ($_FILES["reference"]["type"] == "application/pdf"))
        && (($ext == ".pdf") || ($ext == ".doc") || ($ext == ".docx"))
        && (($ext1 == ".pdf") || ($ext1 == ".doc") || ($ext1 == ".docx"))
        &&  ($_FILES["resume"]["size"] < 400000) //accept upto 500 kb
        &&  ($_FILES["reference"]["size"] < 400000)) {  

stop user } else { allow files to upload }

This is not working as desired, allows even txt files through + the size limit is not being checked, what is wrong with it?

Thanks,

解决方案

The below just uses the mime types to validate a file, then checks the size of both. For a list of most mime types see here or google.

function allowed_file(){

//Add the allowed mime-type files to an 'allowed' array 
 $allowed = array('application/doc', 'application/pdf', 'another/type');

//Check uploaded file type is in the above array (therefore valid)  
    if(in_array($_FILES['resume']['type'], $allowed) AND in_array($_FILES['reference']['type'], $allowed)){

   //If filetypes allowed types are found, continue to check filesize:

  if($_FILES["resume"]["size"] < 400000 AND $_FILES["reference"]["size"] < 400000 ){

    //if both files are below given size limit, allow upload
    //Begin filemove here....

    }

    }

}

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