__DIR__.'/../app',

	/*
	|--------------------------------------------------------------------------
	| Public Path
	|--------------------------------------------------------------------------
	|
	| The public path contains the assets for your web application, such as
	| your JavaScript and CSS files, and also contains the primary entry
	| point for web requests into these applications from the outside.
	|
	*/

	'public' => __DIR__.'/../public',

	/*
	|--------------------------------------------------------------------------
	| Base Path
	|--------------------------------------------------------------------------
	|
	| The base path is the root of the Laravel installation. Most likely you
	| will not need to change this value. But, if for some wild reason it
	| is necessary you will do so here, just proceed with some caution.
	|
	*/

	'base' => __DIR__.'/..',

	/*
	|--------------------------------------------------------------------------
	| Storage Path
	|--------------------------------------------------------------------------
	|
	| The storage path is used by Laravel to store cached Blade views, logs
	| and other pieces of information. You may modify the path here when
	| you want to change the location of this directory for your apps.
	|
	*/

	'storage' => __DIR__.'/../app/storage',

);

有些框架的作法是定義 BASEPATH、APPPATH、SYSDIR等全域常數，然後到處使用這些常數。
Laravel將它們定義在此處，然後bind到核心實體。
好處何在？避免汙染全域環境總是件好事吧！