问题
Sorry for asking it as it may be answered many times before, but my question is little bit different
I have tree like
/var/www/path/to/my/app/
-- index.php
-- b.php
-- inc/
-- include.php
(I'm accessing inc/include.php from index.php,
include "inc/include.php";
)
but in include.php, I need to get absolute path to APPLICATION root, not DOCUMENT_ROOT so in result, I need to be able to use this command
//inc/include.php
include(APP_ROOT."/b.php");
repeating, I do NOT WANT TO CALL IT LIKE
include("../b.php");
is there native function, if possible?
UPDATE:
I am wanting to get PATH by PHP as any open source need to have this path detection why? If I would want to include inc/include.php from ajax/1/somethiing.php, it success but inc/include.php then tries to include ajax/b.php instead of b.php
For Pekka:
I have this tree
-- index.php
-- b.php
-- inc/
-- include.php
-- ajax/
-- 1/
-- ajax.php
Now look. From index.php, you'll call inc/include.php
include("inc/include.php"); //included file
now, included file searchs for
include("../b.php");
It will work, but! If I would call include of inc/include.php from ajax/1/ajax.php, like this
include("../../inc/include.php");
it will work, but included file will try to include
../b.php
instead of ../../b.php as path is relative to file which INCLUDED that inc/include.php Got it ?
回答1:
is there native function, if possible?
no. The document root is the only thing you can get from PHP. (Note however that in your scenario, you can simply call include("b.php");
because the script is still in the context of index.php.)
Re your update:
You can define a global application root in a central configuration file. Say you have config.php
in your app root. Then do a
define("APP_ROOT", dirname(__FILE__));
you still have to include the config file, and you have to use relative paths for it, e.g.
include ("../../../config.php");
but once you have done that, you can work relative to the app root inside the script:
include (APP_ROOT."/b.php"); <-- Will always return the correct path
回答2:
You can resolve the path with the current file as the base
include dirname(__FILE__) . DIRECTORY_SEPARATOR . '/../b.php';
or since PHP5.3
include __DIR__ . \DIRECTORY_SEPERATOR . '/../b.php';
回答3:
Just use
define('APP_ROOT', 'your app root');
in index.php for example. Or in a config file.
回答4:
While it doesn't define your application's root path for you, it might be of interest to check out set_include_path()
回答5:
Add to your index.php:
$GLOBALS['YOUR_CODE_ROOT'] = dirname(__FILE__);
Add to your inc/include.php
:
require_once $GLOBALS['YOUR_CODE_ROOT'].'/b.php';
回答6:
If you only know the relative path, then you have to at least start with a relative path. You could use realpath to return the canonicalized absolute pathname, and then store that somewhere.
In your index.php
, or a config file:
define(
'INC',
realpath(dirname(__FILE__)) .
DIRECTORY_SEPARATOR .
'inc' .
DIRECTORY_SEPARATOR
);
Elsewhere:
include(INC . 'include.php');
Alternatively, define a few constants for the different locations:
define('DOCUMENT_ROOT', realpath(dirname(__FILE__)) . DIRECTORY_SEPARATOR);
define('INC', DOCUMENT_ROOT . 'inc' . DIRECTORY_SEPARATOR);
define('AJAX', DOCUMENT_ROOT . 'ajax' . DIRECTORY_SEPARATOR);
Elsewhere:
include(DOCUMENT_ROOT . 'b.php');
include(INC . 'include.php');
include(AJAX . 'ajax.php');
来源:https://stackoverflow.com/questions/6452935/absolute-or-relative-path-in-php