CodeIgniter路径常量定义 [英] CodeIgniter path constants definitions

问题描述

我遇到过此页面

https://www.codeigniter.com/user_guide/general/reserved_names.html

有人可以向我解释以下常量的作用吗?

Could someone please explain to me what following constants do:

EXT
FCPATH
SELF
BASEPATH
APPPATH

谢谢

推荐答案

这些常量分别在index.php页中定义:

These constants are each defined in the index.php page:

/*
 * -------------------------------------------------------------------
 *  Now that we know the path, set the main path constants
 * -------------------------------------------------------------------
 */
    // The name of THIS file
    define('SELF', pathinfo(__FILE__, PATHINFO_BASENAME));

    // The PHP file extension
    // this global constant is deprecated.
    define('EXT', '.php');

    // Path to the system folder
    define('BASEPATH', str_replace("\\", "/", $system_path));

    // Path to the front controller (this file)
    define('FCPATH', str_replace(SELF, '', __FILE__));

    // Name of the "system folder"
    define('SYSDIR', trim(strrchr(trim(BASEPATH, '/'), '/'), '/'));


    // The path to the "application" folder
    if (is_dir($application_folder))
    {
            define('APPPATH', $application_folder.'/');
    }
    else
    {
            if ( ! is_dir(BASEPATH.$application_folder.'/'))
            {
                    exit("Your application folder path does not appear to be set correctly. Please open the following file and correct this: ".SELF);
            }

            define('APPPATH', BASEPATH.$application_folder.'/');
    }

从 https://github.com/EllisLab/CodeIgniter/blob/develop/index.php

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