php如何向上移动目录直到特定文件

lets say i have a directory structure like this

假设我有一个像这样的目录结构

____
|  Root
    |_____
       Folder1
    |_____
       Folder2
         |_____
            Subfolder2.1
            Subfolder2.2
                 |______
                    Subfolder2.2.1

if i wanted to move upwards from Subfolder2.1 to the Root folder i would have to do ../../ and if i have to move from Subfolder2.2.1 to Root i would have to do ../../../ is there a way in php or in regular expression to write an expression that goes back up the directory until it finds a specific file name (root)

如果我想从Subfolder2.1向上移动到Root文件夹我将不得不做../../如果我必须从Subfolder2.2.1移动到Root我将不得不做../../ .. /有没有办法在PHP或正则表达式中编写一个表达式，该表达式返回目录，直到找到特定的文件名（root）

currently in symfony framework i'm doing something like $defaultTemplate = '::../../../../../app/Resources/views/'.$input->getOption('mytwigdest') to create a template inside a directroy

目前在symfony框架中，我正在做类似$ defaultTemplate =':: ../../../../../ app / Resources / views /'.$ input-> getOption（'mytwigdest'）to to在directroy中创建一个模板

ofcourse this only works for one level of folders not its subfolders or its parent folder, what expression do i need to put in instead of the ../ so that it goes up the directories until it finds a specific directory name

当然，这只适用于一个级别的文件夹而不是它的子文件夹或其父文件夹，我需要放入什么表达式而不是../，以便它上升到目录，直到找到特定的目录名称

__ DIR __ and symfony's $this->container->getParameter('kernel.root_dir') would not work as it would give me the current file's path which is entirely different from where i'm creating a template using $defaultTemplate

__ DIR __和symfony的$ this-> container-> getParameter（'kernel.root_dir'）无效，因为它会给我当前文件的路径，这与我使用$ defaultTemplate创建模板的地方完全不同

2 个解决方案

#1

Although I'm not sure why you need to go with such a way to solve your problem, this will calculate number of parent directories ../ to a custom directory. You only want to change the name. Here it is Root:

虽然我不确定为什么你需要采用这种方式来解决你的问题，但这将计算父目录的数量../到自定义目录。您只想更改名称。这是Root：

str_repeat("../", count(explode(DIRECTORY_SEPARATOR , __FILE__)) - (1 + array_flip(explode(DIRECTORY_SEPARATOR , __FILE__))['Root']));

Put all things together:

把所有东西放在一起：

$defaultTemplate = '::'.str_repeat("../", count(explode(DIRECTORY_SEPARATOR , __FILE__)) - (1 + array_flip(explode(DIRECTORY_SEPARATOR , __FILE__))['Root'])).'app/Resources/views/'.$input->getOption('mytwigdest');

#2

 include($_SERVER['DOCUMENT_ROOT'].'/index.php');

Will always find the direct to root folder. Note you need / after $_SERVER.

总会找到直接到根文件夹。注意你需要/在$ _SERVER之后。

#1