我之前学习过asp , 刚刚开始学习PHP 打开网站源文件夹什么含义?

信赢天下一帆风顺 重庆冠亚保险销售有限公司 运营部经理  2015-08-04 04:19:38
我之前学习过asp , 刚刚开始学习PHP 打开网站源文件中各个文件夹看不明白什么含义?帮助解读一下
applicant
attached
static
system
inddex
web
其中 index内容如下 ;
<?php

/*
*---------------------------------------------------------------
* APPLICATION ENVIRONMENT
*---------------------------------------------------------------
*
* You can load different configurations depending on your
* current environment. Setting the environment also influences
* things like logging and error reporting.
*
* This can be set to anything, but default usage is:
*
* development
* testing
* production
*
* NOTE: If you change these, also change the error_reporting() code below
*
*/
define('ENVIRONMENT', 'testing');
/*
*---------------------------------------------------------------
* ERROR REPORTING
*---------------------------------------------------------------
*
* Different environments will require different levels of error reporting.
* By default development will show errors but testing and live will hide them.
*/

if (defined('ENVIRONMENT'))
{
switch (ENVIRONMENT)
{
case 'development':
error_reporting(E_ALL);
break;

case 'testing':
error_reporting(E_ALL ^ E_NOTICE);
break;

case 'production':
error_reporting(0);
break;

default:
exit('The application environment is not set correctly.');
}
}

/*
*---------------------------------------------------------------
* SYSTEM FOLDER NAME
*---------------------------------------------------------------
*
* This variable must contain the name of your "system" folder.
* Include the path if the folder is not in the same directory
* as this file.
*
*/
$system_path = 'system';

/*
*---------------------------------------------------------------
* APPLICATION FOLDER NAME
*---------------------------------------------------------------
*
* If you want this front controller to use a different "application"
* folder then the default one you can set its name here. The folder
* can also be renamed or relocated anywhere on your server. If
* you do, use a full server path. For more info please see the user guide:
* http://codeigniter.com/user_guide/general/managing_apps.html
*
* NO TRAILING SLASH!
*
*/
$application_folder = 'application';

/*
* --------------------------------------------------------------------
* DEFAULT CONTROLLER
* --------------------------------------------------------------------
*
* Normally you will set your default controller in the routes.php file.
* You can, however, force a custom routing by hard-coding a
* specific controller class/function here. For most applications, you
* WILL NOT set your routing here, but it's an option for those
* special instances where you might want to override the standard
* routing in a specific front controller that shares a common CI installation.
*
* IMPORTANT: If you set the routing here, NO OTHER controller will be
* callable. In essence, this preference limits your application to ONE
* specific controller. Leave the function name blank if you need
* to call functions dynamically via the URI.
*
* Un-comment the $routing array below to use this feature
*
*/
// The directory name, relative to the "controllers" folder. Leave blank
// if your controller is not in a sub-folder within the "controllers" folder
// $routing['directory'] = '';

// The controller class file name. Example: Mycontroller
// $routing['controller'] = '';

// The controller function you wish to be called.
// $routing['function'] = '';


/*
* -------------------------------------------------------------------
* CUSTOM CONFIG VALUES
* -------------------------------------------------------------------
*
* The $assign_to_config array below will be passed dynamically to the
* config class when initialized. This allows you to set custom config
* items or override any default config values found in the config.php file.
* This can be handy as it permits you to share one application between
* multiple front controller files, with each file containing different
* config values.
*
* Un-comment the $assign_to_config array below to use this feature
*
*/
// $assign_to_config['name_of_config_item'] = 'value of config item';



// --------------------------------------------------------------------
// END OF USER CONFIGURABLE SETTINGS. DO NOT EDIT BELOW THIS LINE
// --------------------------------------------------------------------

/*
* ---------------------------------------------------------------
* Resolve the system path for increased reliability
* ---------------------------------------------------------------
*/

// Set the current directory correctly for CLI requests
if (defined('STDIN'))
{
chdir(dirname(__FILE__));
}

if (realpath($system_path) !== FALSE)
{
$system_path = realpath($system_path).'/';
}

// ensure there's a trailing slash
$system_path = rtrim($system_path, '/').'/';

// Is the system path correct?
if ( ! is_dir($system_path))
{
exit("Your system folder path does not appear to be set correctly. Please open the following file and correct this: ".pathinfo(__FILE__, PATHINFO_BASENAME));
}

/*
* -------------------------------------------------------------------
* 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.'/');
}

/*
* --------------------------------------------------------------------
* LOAD THE BOOTSTRAP FILE
* --------------------------------------------------------------------
*
* And away we go...
*
*/
require_once BASEPATH.'core/CodeIgniter.php';

/* End of file index.php */
/* Location: ./index.php */

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智商众筹 2015-08-04
这是php的框架吧,如果了解MVC应该不难理解,初学个人不建议碰完整项目
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