php PHP绝对路径到root
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PHP absolute path to root
提问by SZT
I can't believe PHP doesn't have an easy solution of this simple matter. ASP.NET has a ~ sign that cares of this issue and starts everything from root level. Here's my problem:
我不敢相信 PHP 没有解决这个简单问题的简单方法。ASP.NET 有一个 ~ 标志关心这个问题，并从根级别开始一切。这是我的问题：
localhost/MySite
-->Admin
-- Edit.php
-->Class
-- class.EditInfo.php
-->Texts
-- MyInfo.txt
--ShowInfo.php
Inside class.EditInfo.php I am accessing MyInfo.txt so I defined a relative path "../Texts/MyInfo.txt". Then I created an object of EditInfo in Admin/Edit.php and accessed Texts/MyInfo.txt it worked fine.
在 class.EditInfo.php 中，我正在访问 MyInfo.txt，因此我定义了一个相对路径“../Texts/MyInfo.txt”。然后我在 Admin/Edit.php 中创建了一个 EditInfo 对象并访问 Texts/MyInfo.txt 它工作正常。
But now I have to create an object of EditInfo in ShowInfo.php and access Texts/MyInfo.txt and here's the problem occurs. As I am using a relative path in my class whenever I am creating an objEditInfo and trying to access MyInfo.txt I am getting "File doesn't exist" error.
但是现在我必须在 ShowInfo.php 中创建一个 EditInfo 对象并访问 Texts/MyInfo.txt 并且出现问题。每当我创建 objEditInfo 并尝试访问 MyInfo.txt 时，我都会在我的班级中使用相对路径，因此我收到“文件不存在”错误。
Now I am looking for something that's equivalent to "~/Texts/MyInfo.txt" of ASP.NET. Is there anything similar to that out there??? Or do I have to set the path with some if/else condition?
现在我正在寻找相当于 ASP.NET 的“~/Texts/MyInfo.txt”的东西。有没有类似的啊？？？或者我是否必须用一些 if/else 条件设置路径？
UPDATE:
更新：
I used $_SERVER['DOCUMENT_ROOT']. I was using a subfolder where my actual website was. So I had to use $_SERVER['DOCUMENT_ROOT']."/mySite" & then adding rest of the address ("/Texts/MyInfo.php") to it.
我使用了 $_SERVER['DOCUMENT_ROOT']。我正在使用我的实际网站所在的子文件夹。所以我不得不使用 $_SERVER['DOCUMENT_ROOT']."/mySite" & 然后向它添加地址的其余部分 ("/Texts/MyInfo.php")。
回答by Besnik
Create a constant with absolute path to the root by using definein ShowInfo.php:
使用definein创建一个具有绝对路径的常量ShowInfo.php：
define('ROOTPATH', __DIR__);
Or PHP <= 5.3
或 PHP <= 5.3
define('ROOTPATH', dirname(__FILE__));
Now use it:
现在使用它：
if (file_exists(ROOTPATH.'/Texts/MyInfo.txt')) {
// ...
}
Or use the DOCUMENT_ROOTdefined in $_SERVER:
或使用中DOCUMENT_ROOT定义的$_SERVER：
if (file_exists($_SERVER['DOCUMENT_ROOT'].'/Texts/MyInfo.txt')) {
// ...
}
回答by Razvan
In PHP there is a global variable containing various details related to the server. It's called $_SERVER. It contains also the root:
在 PHP 中有一个包含与服务器相关的各种详细信息的全局变量。它被称为 $_SERVER。它还包含根：
$_SERVER['DOCUMENT_ROOT']
The only problem is that the entries in this variable are provided by the web server and there is no guarantee that all web servers offer them.
唯一的问题是此变量中的条目由 Web 服务器提供，并且不能保证所有 Web 服务器都提供它们。
回答by John Slegers
It always best to start any custom PHP project with a bootstrap file where you define the most commonly used paths as constants, based on values extracted from $_SERVER. It should make migrating your projects or parts of your project to another server or to another directory on the server a hell of a lot easier.
最好使用引导程序文件启动任何自定义 PHP 项目，您可以根据从$_SERVER. 它应该使将您的项目或项目的一部分迁移到另一台服务器或服务器上的另一个目录变得容易得多。
This is how I define my root paths :
这就是我定义根路径的方式：
define("LOCAL_PATH_ROOT", $_SERVER["DOCUMENT_ROOT"]);
define("HTTP_PATH_ROOT", isset($_SERVER["HTTP_HOST"]) ? $_SERVER["HTTP_HOST"] : (isset($_SERVER["SERVER_NAME"]) ? $_SERVER["SERVER_NAME"] : '_UNKNOWN_'));
The path LOCAL_PATH_ROOTis the document root. The path HTTP_PATH_ROOTis the equivalent when accessing the same path via HTTP.
路径LOCAL_PATH_ROOT是文档根。HTTP_PATH_ROOT当通过 HTTP 访问同一路径时，该路径是等效的。
At that point, converting any local path to an HTTP path can be done with the following code :
此时，可以使用以下代码将任何本地路径转换为 HTTP 路径：
str_replace(LOCAL_PATH_ROOT, RELATIVE_PATH_ROOT, $my_path)
If you want to ensure compatibility with Windows based servers, you'll need to replace the directory seperator with a URL seperator as well :
如果要确保与基于 Windows 的服务器兼容，则还需要将目录分隔符替换为 URL 分隔符：
str_replace(LOCAL_PATH_ROOT, RELATIVE_PATH_ROOT, str_replace(DIRECTORY_SEPARATOR, '/', $my_path))
Here's the full bootstrap code that I'm using for the PHP PowerTools boilerplate:
这是我用于PHP PowerTools 样板的完整引导代码：
defined('LOCAL_PATH_BOOTSTRAP') || define("LOCAL_PATH_BOOTSTRAP", __DIR__);
// -----------------------------------------------------------------------
// DEFINE SEPERATOR ALIASES
// -----------------------------------------------------------------------
define("URL_SEPARATOR", '/');
define("DS", DIRECTORY_SEPARATOR);
define("PS", PATH_SEPARATOR);
define("US", URL_SEPARATOR);
// -----------------------------------------------------------------------
// DEFINE ROOT PATHS
// -----------------------------------------------------------------------
define("RELATIVE_PATH_ROOT", '');
define("LOCAL_PATH_ROOT", $_SERVER["DOCUMENT_ROOT"]);
define("HTTP_PATH_ROOT",
isset($_SERVER["HTTP_HOST"]) ?
$_SERVER["HTTP_HOST"] : (
isset($_SERVER["SERVER_NAME"]) ?
$_SERVER["SERVER_NAME"] : '_UNKNOWN_'));
// -----------------------------------------------------------------------
// DEFINE RELATIVE PATHS
// -----------------------------------------------------------------------
define("RELATIVE_PATH_BASE",
str_replace(LOCAL_PATH_ROOT, RELATIVE_PATH_ROOT, getcwd()));
define("RELATIVE_PATH_APP", dirname(RELATIVE_PATH_BASE));
define("RELATIVE_PATH_LIBRARY", RELATIVE_PATH_APP . DS . 'vendor');
define("RELATIVE_PATH_HELPERS", RELATIVE_PATH_BASE);
define("RELATIVE_PATH_TEMPLATE", RELATIVE_PATH_BASE . DS . 'templates');
define("RELATIVE_PATH_CONFIG", RELATIVE_PATH_BASE . DS . 'config');
define("RELATIVE_PATH_PAGES", RELATIVE_PATH_BASE . DS . 'pages');
define("RELATIVE_PATH_ASSET", RELATIVE_PATH_BASE . DS . 'assets');
define("RELATIVE_PATH_ASSET_IMG", RELATIVE_PATH_ASSET . DS . 'img');
define("RELATIVE_PATH_ASSET_CSS", RELATIVE_PATH_ASSET . DS . 'css');
define("RELATIVE_PATH_ASSET_JS", RELATIVE_PATH_ASSET . DS . 'js');
// -----------------------------------------------------------------------
// DEFINE LOCAL PATHS
// -----------------------------------------------------------------------
define("LOCAL_PATH_BASE", LOCAL_PATH_ROOT . RELATIVE_PATH_BASE);
define("LOCAL_PATH_APP", LOCAL_PATH_ROOT . RELATIVE_PATH_APP);
define("LOCAL_PATH_LIBRARY", LOCAL_PATH_ROOT . RELATIVE_PATH_LIBRARY);
define("LOCAL_PATH_HELPERS", LOCAL_PATH_ROOT . RELATIVE_PATH_HELPERS);
define("LOCAL_PATH_TEMPLATE", LOCAL_PATH_ROOT . RELATIVE_PATH_TEMPLATE);
define("LOCAL_PATH_CONFIG", LOCAL_PATH_ROOT . RELATIVE_PATH_CONFIG);
define("LOCAL_PATH_PAGES", LOCAL_PATH_ROOT . RELATIVE_PATH_PAGES);
define("LOCAL_PATH_ASSET", LOCAL_PATH_ROOT . RELATIVE_PATH_ASSET);
define("LOCAL_PATH_ASSET_IMG", LOCAL_PATH_ROOT . RELATIVE_PATH_ASSET_IMG);
define("LOCAL_PATH_ASSET_CSS", LOCAL_PATH_ROOT . RELATIVE_PATH_ASSET_CSS);
define("LOCAL_PATH_ASSET_JS", LOCAL_PATH_ROOT . RELATIVE_PATH_ASSET_JS);
// -----------------------------------------------------------------------
// DEFINE URL PATHS
// -----------------------------------------------------------------------
if (US === DS) { // needed for compatibility with windows
define("HTTP_PATH_BASE", HTTP_PATH_ROOT . RELATIVE_PATH_BASE);
define("HTTP_PATH_APP", HTTP_PATH_ROOT . RELATIVE_PATH_APP);
define("HTTP_PATH_LIBRARY", false);
define("HTTP_PATH_HELPERS", false);
define("HTTP_PATH_TEMPLATE", false);
define("HTTP_PATH_CONFIG", false);
define("HTTP_PATH_PAGES", false);
define("HTTP_PATH_ASSET", HTTP_PATH_ROOT . RELATIVE_PATH_ASSET);
define("HTTP_PATH_ASSET_IMG", HTTP_PATH_ROOT . RELATIVE_PATH_ASSET_IMG);
define("HTTP_PATH_ASSET_CSS", HTTP_PATH_ROOT . RELATIVE_PATH_ASSET_CSS);
define("HTTP_PATH_ASSET_JS", HTTP_PATH_ROOT . RELATIVE_PATH_ASSET_JS);
} else {
define("HTTP_PATH_BASE", HTTP_PATH_ROOT .
str_replace(DS, US, RELATIVE_PATH_BASE));
define("HTTP_PATH_APP", HTTP_PATH_ROOT .
str_replace(DS, US, RELATIVE_PATH_APP));
define("HTTP_PATH_LIBRARY", false);
define("HTTP_PATH_HELPERS", false);
define("HTTP_PATH_TEMPLATE", false);
define("HTTP_PATH_CONFIG", false);
define("HTTP_PATH_PAGES", false);
define("HTTP_PATH_ASSET", HTTP_PATH_ROOT .
str_replace(DS, US, RELATIVE_PATH_ASSET));
define("HTTP_PATH_ASSET_IMG", HTTP_PATH_ROOT .
str_replace(DS, US, RELATIVE_PATH_ASSET_IMG));
define("HTTP_PATH_ASSET_CSS", HTTP_PATH_ROOT .
str_replace(DS, US, RELATIVE_PATH_ASSET_CSS));
define("HTTP_PATH_ASSET_JS", HTTP_PATH_ROOT .
str_replace(DS, US, RELATIVE_PATH_ASSET_JS));
}
// -----------------------------------------------------------------------
// DEFINE REQUEST PARAMETERS
// -----------------------------------------------------------------------
define("REQUEST_QUERY",
isset($_SERVER["QUERY_STRING"]) && $_SERVER["QUERY_STRING"] != '' ?
$_SERVER["QUERY_STRING"] : false);
define("REQUEST_METHOD",
isset($_SERVER["REQUEST_METHOD"]) ?
strtoupper($_SERVER["REQUEST_METHOD"]) : false);
define("REQUEST_STATUS",
isset($_SERVER["REDIRECT_STATUS"]) ?
$_SERVER["REDIRECT_STATUS"] : false);
define("REQUEST_PROTOCOL",
isset($_SERVER["HTTP_ORIGIN"]) ?
substr($_SERVER["HTTP_ORIGIN"], 0,
strpos($_SERVER["HTTP_ORIGIN"], '://') + 3) : 'http://');
define("REQUEST_PATH",
isset($_SERVER["REQUEST_URI"]) ?
str_replace(RELATIVE_PATH_BASE, '',
$_SERVER["REQUEST_URI"]) : '_UNKNOWN_');
define("REQUEST_PATH_STRIP_QUERY",
REQUEST_QUERY ?
str_replace('?' . REQUEST_QUERY, '', REQUEST_PATH) : REQUEST_PATH);
// -----------------------------------------------------------------------
// DEFINE SITE PARAMETERS
// -----------------------------------------------------------------------
define("PRODUCTION", false);
define("PAGE_PATH_DEFAULT", US . 'index');
define("PAGE_PATH",
(REQUEST_PATH_STRIP_QUERY === US) ?
PAGE_PATH_DEFAULT : REQUEST_PATH_STRIP_QUERY);
If you add the above code to your own project, outputting all user constants at this point (which you can do with get_defined_constants(true)should give a result that looks somewhat like this :
如果您将上面的代码添加到您自己的项目中，此时输出所有用户常量（您可以使用它get_defined_constants(true)应该给出看起来有点像这样的结果：
array (
'LOCAL_PATH_BOOTSTRAP' => '/var/www/libraries/backend/Data/examples',
'URL_SEPARATOR' => '/',
'DS' => '/',
'PS' => ':',
'US' => '/',
'RELATIVE_PATH_ROOT' => '',
'LOCAL_PATH_ROOT' => '/var/www',
'HTTP_PATH_ROOT' => 'localhost:8888',
'RELATIVE_PATH_BASE' => '/libraries/backend/Data/examples',
'RELATIVE_PATH_APP' => '/libraries/backend/Data',
'RELATIVE_PATH_LIBRARY' => '/libraries/backend/Data/vendor',
'RELATIVE_PATH_HELPERS' => '/libraries/backend/Data/examples',
'RELATIVE_PATH_TEMPLATE' => '/libraries/backend/Data/examples/templates',
'RELATIVE_PATH_CONFIG' => '/libraries/backend/Data/examples/config',
'RELATIVE_PATH_PAGES' => '/libraries/backend/Data/examples/pages',
'RELATIVE_PATH_ASSET' => '/libraries/backend/Data/examples/assets',
'RELATIVE_PATH_ASSET_IMG' => '/libraries/backend/Data/examples/assets/img',
'RELATIVE_PATH_ASSET_CSS' => '/libraries/backend/Data/examples/assets/css',
'RELATIVE_PATH_ASSET_JS' => '/libraries/backend/Data/examples/assets/js',
'LOCAL_PATH_BASE' => '/var/www/libraries/backend/Data/examples',
'LOCAL_PATH_APP' => '/var/www/libraries/backend/Data',
'LOCAL_PATH_LIBRARY' => '/var/www/libraries/backend/Data/vendor',
'LOCAL_PATH_HELPERS' => '/var/www/libraries/backend/Data/examples',
'LOCAL_PATH_TEMPLATE' => '/var/www/libraries/backend/Data/examples/templates',
'LOCAL_PATH_CONFIG' => '/var/www/libraries/backend/Data/examples/config',
'LOCAL_PATH_PAGES' => '/var/www/libraries/backend/Data/examples/pages',
'LOCAL_PATH_ASSET' => '/var/www/libraries/backend/Data/examples/assets',
'LOCAL_PATH_ASSET_IMG' => '/var/www/libraries/backend/Data/examples/assets/img',
'LOCAL_PATH_ASSET_CSS' => '/var/www/libraries/backend/Data/examples/assets/css',
'LOCAL_PATH_ASSET_JS' => '/var/www/libraries/backend/Data/examples/assets/js',
'HTTP_PATH_BASE' => 'localhost:8888/libraries/backend/Data/examples',
'HTTP_PATH_APP' => 'localhost:8888/libraries/backend/Data',
'HTTP_PATH_LIBRARY' => false,
'HTTP_PATH_HELPERS' => false,
'HTTP_PATH_TEMPLATE' => false,
'HTTP_PATH_CONFIG' => false,
'HTTP_PATH_PAGES' => false,
'HTTP_PATH_ASSET' => 'localhost:8888/libraries/backend/Data/examples/assets',
'HTTP_PATH_ASSET_IMG' => 'localhost:8888/libraries/backend/Data/examples/assets/img',
'HTTP_PATH_ASSET_CSS' => 'localhost:8888/libraries/backend/Data/examples/assets/css',
'HTTP_PATH_ASSET_JS' => 'localhost:8888/libraries/backend/Data/examples/assets/js',
'REQUEST_QUERY' => false,
'REQUEST_METHOD' => 'GET',
'REQUEST_STATUS' => false,
'REQUEST_PROTOCOL' => 'http://',
'REQUEST_PATH' => '/',
'REQUEST_PATH_STRIP_QUERY' => '/',
'PRODUCTION' => false,
'PAGE_PATH_DEFAULT' => '/index',
'PAGE_PATH' => '/index',
)
回答by Jeremy D
You can access the $_SERVER['DOCUMENT_ROOT']variable :
您可以访问$_SERVER['DOCUMENT_ROOT']变量：
<?php
$path = $_SERVER['DOCUMENT_ROOT'];
$path .= "/subdir1/yourdocument.txt";
?>
回答by Jon Gauthier
The best way to do this given your setup is to define a constant describing the root path of your site. You can create a file config.phpat the root of your application:
鉴于您的设置，最好的方法是定义一个描述站点根路径的常量。您可以config.php在应用程序的根目录创建一个文件：
<?php
define('SITE_ROOT', dirname(__FILE__));
$file_path = SITE_ROOT . '/Texts/MyInfo.txt';
?>
Then include config.phpin each entry point script and reference SITE_ROOTin your code rather than giving a relative path.
然后config.php在每个入口点脚本和SITE_ROOT代码中包含引用，而不是提供相对路径。
回答by Martin
use dirname(__FILE__)in a global configuration file.
使用dirname(__FILE__)一个全局配置文件。
回答by venkatskpi
The best way Using dirname(). Because SERVER['DOCUMENT_ROOT'] not working all servers, and also return server running path.
最好的方法 使用 dirname()。因为 SERVER['DOCUMENT_ROOT'] 不是所有服务器都在工作，而且还返回服务器运行路径。
$root = dirname( __FILE__ );
$root = __DIR__;
$filePath = realpath(dirname(__FILE__));
$rootPath = realpath($_SERVER['DOCUMENT_ROOT']);
$htmlPath = str_replace($root, '', $filePath);
