用PHP重命名上传的文件，但保留扩展名 [英] Rename an uploaded file with PHP but keep the extension

问题描述

我使用PHP将图像从表单上传到服务器，并且想要重命名图像lastname_firstname。[original extension]。我目前有：
$ b $ pre $ lt; code> move_uploaded_file（$ _ FILES [picture] [tmp_name]，peopleimages /。$ _POST [lastname]。'&＃95;'。$ _POST [firstname]）

当然，其中，没有扩展名重命名文件lastname_firstname。如何重命名文件，但保留扩展名？

感谢！

解决方案

你需要先找出原来的扩展名是什么; - ）

要做到这一点， pathinfo 函数可以创造奇迹; - ）


引用手册中给出的例子：

$ $ $ $ $ $ $ $ $ $ $ $ $ $ $ path_parts = PATHINFO（ '/ WWW / htdocs中/ index.html中'）;
echo $ path_parts ['dirname']，\\\
;
echo $ path_parts ['basename']，\\\
;
echo $ path_parts ['extension']，\\\
;
echo $ path_parts ['filename']，\\\
; //自PHP 5.2.0开始

会给你：

  / www / htdocs 
 index.html 
 html 
索引
  

作为旁注，不要忘记安全性：

$ ul

在这种情况下，您应该转义 $ _ POST [lastname] ，以确保它只包含有效的字符

• 而且，顺便说一句，您应该使用 $ _ POST ['lastname'] - 参见为什么 $ foo [ bar] 错误？



• 您应该检查文件是图片
  
  
  
  
  • 请参阅 mime_content_type 5.3
  
  
  • 和/或 <$对于PHP> = 5.3
    
  
  
  
  code> finfo_file

  I'm using PHP to upload an image from a form to the server and want to rename the image lastname_firstname.[original extension]. I currently have:

  move_uploaded_file($_FILES["picture"]["tmp_name"], "peopleimages/" . "$_POST[lastname]" . '_' . "$_POST[firstname]")
  

  which, of course, renames the file lastname_firstname without an extension. How do I rename the file but keep the extension?

  Thanks!

  解决方案

  You need to first find out what the original extension was ;-)

  To do that, the pathinfo function can do wonders ;-)

  
  Quoting the example that's given in the manual :

  $path_parts = pathinfo('/www/htdocs/index.html');
  echo $path_parts['dirname'], "\n";
  echo $path_parts['basename'], "\n";
  echo $path_parts['extension'], "\n";
  echo $path_parts['filename'], "\n"; // since PHP 5.2.0
  

  Will give you :

  /www/htdocs
  index.html
  html
  index
  

  
  As a sidenote, don't forget about security :

  • In your case, you should escape $_POST[lastname], to make sure it only contains valid characters
    • And, BTW, you should use $_POST['lastname'] -- see Why is $foo[bar] wrong?
  • You should also check that the file is an image
    • See mime_content_type for PHP < 5.3
    • And/or finfo_file for PHP >= 5.3

  这篇关于用PHP重命名上传的文件，但保留扩展名的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！