php有獲得絕對地址的函數(shù)嗎？

yesoft

比如想獲得

http://csdn.net/expert/001/./../../example.php

的絕對地址
http://csdn.net/example.php

再者，具體容錯性

http://csdn.net/../../../../index.php
獲得其的真實地址http://csdn.net/../../../../index.php

想得到上述答案該用什么函數(shù)呢？

HonestQiao

這個相對的關(guān)系恐怕不是那么好獲得的！

一個簡單的例子：如果服務(wù)器設(shè)置了虛擬目錄怎么辦？
或者符號鏈接怎么辦？

一般自己寫一個析構(gòu)就可以分析了。

hightman

手冊上抄一段給你,應(yīng)該可用.

1. 
   
2. carlosreche at yahoo dot com
   
3. 16-Dec-2004 07:52
   
4. In my last function, it will always discard "../" if there are no more parent dirs to go back. But it's a mistake! For example, relative paths like "../../downloads" returns "downloads/", and it should return exactly the same entry (because parent directories for "downloads" may exist in this case). Well, I've corrected this bug. Now:
   
5. 
   
6. "C:/downloads/../../../" returns "C:/"
   
7. "downloads/../../../"  returns  "../../"
   
8. 
   
9. <?php
   
10. 
    
11. function real_path($path)
    
12. {
    
13.    if ($path == "")
    
14.    {
    
15.        return false;
    
16.    }
    
17. 
    
18.    $path = trim(preg_replace("/\\\\/", "/", (string)$path));
    
19. 
    
20.    if (!preg_match("/(\.\w{1,4})$/", $path)  &&  
    
21.        !preg_match("/\?[^\\/]+$/", $path)  &&  
    
22.        !preg_match("/\\/$/", $path))
    
23.    {
    
24.        $path .= '/';
    
25.    }
    
26. 
    
27.    $pattern = "/^(\\/|\w:\\/|https?:\\/\\/[^\\/]+\\/)?(.*)$/i";
    
28. 
    
29.    preg_match_all($pattern, $path, $matches, PREG_SET_ORDER);
    
30. 
    
31.    $path_tok_1 = $matches[0][1];
    
32.    $path_tok_2 = $matches[0][2];
    
33. 
    
34.    $path_tok_2 = preg_replace(
    
35.                    array("/^\\/+/", "/\\/+/"),
    
36.                    array("", "/"),
    
37.                    $path_tok_2);
    
38. 
    
39.    $path_parts = explode("/", $path_tok_2);
    
40.    $real_path_parts = array();
    
41. 
    
42.    for ($i = 0, $real_path_parts = array(); $i < count($path_parts); $i++)
    
43.    {
    
44.        if ($path_parts[$i] == '.')
    
45.        {
    
46.            continue;
    
47.        }
    
48.        else if ($path_parts[$i] == '..')
    
49.        {
    
50.            if (  (isset($real_path_parts[0])  &&  $real_path_parts[0] != '..')
    
51.                || ($path_tok_1 != "")  )
    
52.            {
    
53.                array_pop($real_path_parts);
    
54.                continue;
    
55.            }
    
56.        }
    
57. 
    
58.        array_push($real_path_parts, $path_parts[$i]);
    
59.    }
    
60. 
    
61.    return $path_tok_1 . implode('/', $real_path_parts);
    
62. }
    
63. 
    
64. ?>
    

復(fù)制代碼