对于任何自定义PHP项目,最好使用引导文件开始,在其中定义最常用的路径为常量,这些常量基于从$_SERVER
中提取的值。这样做可以使迁移您的项目或项目的某些部分到另一个服务器或服务器上的另一个目录变得更加容易。
以下是我定义根路径的方法:
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_'));
LOCAL_PATH_ROOT
路径为文档根目录。HTTP_PATH_ROOT
路径在通过HTTP访问相同路径时等效。
此时,将任何本地路径转换为HTTP路径可以使用以下代码完成:
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))
这是我在PHP PowerTools样板中使用的完整Bootstrap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自己的项目中,在此时输出所有用户常量(您可以使用
get_defined_constants(true)
实现),应该会得到类似于以下结果的结果:
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',
)