PHP到root的绝对路径

时间:2012-07-22 22:17:27

标签: php relative-path absolute-path

我无法相信PHP没有这个简单问题的简单解决方案。 ASP.NET有一个关注此问题的标志,并从根级别开始。这是我的问题:

localhost/MySite
   -->Admin
      -- Edit.php
   -->Class
      -- class.EditInfo.php
   -->Texts
      -- MyInfo.txt
   --ShowInfo.php

在class.EditInfo.php中我正在访问MyInfo.txt,所以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,并访问了Texts / MyInfo.txt它运行正常。

但是现在我必须在ShowInfo.php中创建一个EditInfo对象并访问Texts / MyInfo.txt,这就出现了问题。因为每当我创建一个objEditInfo并尝试访问MyInfo.txt时,我在我的类中使用相对路径,我得到“文件不存在”错误。

现在我正在寻找与ASP.NET的“〜/ Texts / MyInfo.txt”等效的东西。那里有什么类似的吗?或者我是否必须使用if / else条件设置路径?


更新

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”&然后添加其余的地址(“/Texts/MyInfo.php”)。

8 个答案:

答案 0 :(得分:50)

使用define中的ShowInfo.php创建一个带根绝对路径的常量:

define('ROOTPATH', __DIR__);

或PHP< = 5.3

define('ROOTPATH', dirname(__FILE__));

现在使用它:

if (file_exists(ROOTPATH.'/Texts/MyInfo.txt')) {
  // ...
}

或使用DOCUMENT_ROOT中定义的$_SERVER

if (file_exists($_SERVER['DOCUMENT_ROOT'].'/Texts/MyInfo.txt')) {
  // ...
}

答案 1 :(得分:27)

在PHP中,有一个全局变量,包含与服务器相关的各种详细信息。它被称为$ _SERVER。它还包含根:

 $_SERVER['DOCUMENT_ROOT']

唯一的问题是此变量中的条目是由Web服务器提供的,并且无法保证所有Web服务器都提供它们。

答案 2 :(得分:5)

最好使用引导文件启动任何自定义PHP项目,您可以根据从$_SERVER中提取的值将最常用的路径定义为常量。它应该使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更容易。

这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_'));

路径LOCAL_PATH_ROOT是文档根目录。当通过HTTP访问相同路径时,路径HTTP_PATH_ROOT是等效的。

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)

如果您想确保与基于Windows的服务器兼容,您还需要使用URL分隔符替换目录分隔符:

str_replace(LOCAL_PATH_ROOT, RELATIVE_PATH_ROOT, str_replace(DIRECTORY_SEPARATOR, '/', $my_path))

这是我用于PHP PowerTools boilerplate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);

如果您将上述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get_defined_constants(true)执行此操作应该会得到一个看起来像这样的结果:

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',
)

答案 3 :(得分:2)

根据您的设置,最好的方法是定义一个描述站点根路径的常量。您可以在应用程序的根目录中创建文件config.php

<?php

define('SITE_ROOT', dirname(__FILE__));

$file_path = SITE_ROOT . '/Texts/MyInfo.txt';

?>

然后在每个入口点脚本中加入config.php,并在代码中引用SITE_ROOT,而不是给出相对路径。

答案 4 :(得分:2)

您可以访问$_SERVER['DOCUMENT_ROOT']变量:

<?php 
   $path = $_SERVER['DOCUMENT_ROOT'];
   $path .= "/subdir1/yourdocument.txt";
?>

答案 5 :(得分:0)

在全局配置文件中使用dirname(__FILE__)

答案 6 :(得分:0)

使用dirname()的最佳方法。因为SERVER ['DOCUMENT_ROOT']不能正常运行所有服务器,并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);

答案 7 :(得分:0)

这是我找到rootstart的方法。 在 ROOT 处创建一个名为 mainpath.php 的文件

<?php 
## DEFINE ROOTPATH
$check_data_exist = ""; 

$i_surf = 0;

// looking for mainpath.php at the aktiv folder or higher folder

while (!file_exists($check_data_exist."mainpath.php")) {
  $check_data_exist .= "../"; 
  $i_surf++;
  // max 7 folder deep
  if ($i_surf == 7) { 
   return false;
  }
}

define("MAINPATH", ($check_data_exist ? $check_data_exist : "")); 
?>

对我来说,这是找到它们的最好和最简单的方法。 ^^