是否有适用于iPhone sdk的TFTP客户端，可以将文件传输到TFTP服务器？(Is there any TFTP client for iPhone sdk, which can tranfer files to TFTP server?)

 如果文件a.php在另一个目录中，则路径可以是相对的（对于当前文件a.php目录）或绝对路径（基于服务器绝对文件路径）。 
 
 亲戚的例子： 
 
<?php 
     include('../a.php'); // one directory back, as the file path is always relative to the file in which include (or require or any of the others) is being called.
?>
 
 绝对的例子： 
 
<?php
     include('/path/to/server/root/some/folder/a.php'); // absolute path 
?>
 
 希望这可以帮助。 
 
 
 UPDATE 
 
 你一直说“它是错的”或“它不起作用”，但你真的没有很好地解释你的文件结构。 所以我要假设您的文件夹结构看起来像这样，例如： 
 
 
 
 WEB ROOT 
  
 
   
 项目A 
 
    
 
     
 a.php只会 
 
    
 
   
 项目B 
 
    
 
     
 b.php 
 
    
 
  
 
 
 现在，如果你在a.php中，你可以按如下方式要求b.php： 
 
 require_once('../ProjectB/b.php'); 
 
 如果你在b.php里面并希望包含a.php，它可以如下： 
 
 include_once('../ProjectA/a.php'); 
 
 注意，我使用了包括AND require，由您来研究使用哪个。 

If file a.php is in another directory, the path can be either relative (to your current file a.php directory) or absolute (based on your servers absolute file path). 
 
Example of relative: 
 
<?php 
     include('../a.php'); // one directory back, as the file path is always relative to the file in which include (or require or any of the others) is being called.
?>
 
Example of absolute:
 
<?php
     include('/path/to/server/root/some/folder/a.php'); // absolute path 
?>
 
Hope this helps.
 
 
UPDATE
 
You keep saying "it's wrong" or "it doesn't work" but you really have not explained your file structure very well. So I am going to ASSUME that your folder structure looks like this, for examples sake:
 
 
 
WEB ROOT 
  
 
   
ProjectA
 
    
 
     
a.php 
 
    
 
   
ProjectB
 
    
 
     
b.php
 
    
 
  
 
 
Now, if you were inside of a.php, you could require b.php as follows:
 
require_once('../ProjectB/b.php');
 
If you were inside of b.php and wanted to include a.php, it could be as follows:
 
include_once('../ProjectA/a.php');
 
Note, I have used include AND require, it's up to you to research which to use.