Yii2 htaccess - How to hide frontend/web and backend/web COMPLETELY

gistfile1.txt

Step 1 
Create .htaccess file in root folder, i.e advanced/.htaccess and write below code.
---------------
Options +FollowSymlinks
RewriteEngine On

# deal with admin first
RewriteCond %{REQUEST_URI} ^/(admin) <------
RewriteRule ^admin/assets/(.*)$ backend/web/assets/$1 [L]
RewriteRule ^admin/css/(.*)$ backend/web/css/$1 [L]

RewriteCond %{REQUEST_URI} !^/backend/web/(assets|css)/  <------
RewriteCond %{REQUEST_URI} ^/(admin)  <------
RewriteRule ^.*$ backend/web/index.php [L]


RewriteCond %{REQUEST_URI} ^/(assets|css)  <------
RewriteRule ^assets/(.*)$ frontend/web/assets/$1 [L]
RewriteRule ^css/(.*)$ frontend/web/css/$1 [L]

RewriteCond %{REQUEST_URI} !^/(frontend|backend)/web/(assets|css)/  <------
RewriteCond %{REQUEST_URI} !index.php
RewriteCond %{REQUEST_FILENAME} !-f [OR]
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^.*$ frontend/web/index.php
---------------

Note : if you are trying in local server then replace ^/ with ^/project_name/ where you see arrow sign. 
Remove those arrow sign <------ after setup is done.

Step 2 
Now create a components/Request.php file in common directory and write below code in this file.
---------------
<?php
namespace common\components;

class Request extends \yii\web\Request {
    public $web;
    public $adminUrl;

    public function getBaseUrl(){
        return str_replace($this->web, "", parent::getBaseUrl()) . $this->adminUrl;
    }

    /*
        If you don't have this function, the admin site will 404 if you leave off 
        the trailing slash.

        E.g.:

        Wouldn't work:
        site.com/admin

        Would work:
        site.com/admin/

        Using this function, both will work.
    */
    public function resolvePathInfo(){
        if($this->getUrl() === $this->adminUrl){
            return "";
        }else{
            return parent::resolvePathInfo();
        }
    }
} ?>
---------------

Step 3 
Installing component. Write below code in frontend/config/main.php and backend/config/main.php files respectively.
-------------------------
//frontend, under components array
'request'=>[
    'class' => 'common\components\Request',
    'web'=> '/frontend/web'
],
'urlManager' => [
        'enablePrettyUrl' => true,
        'showScriptName' => false,
],
-------------------------
// backend, under components array
'request'=>[
    'class' => 'common\components\Request',
    'web'=> '/backend/web',
    'adminUrl' => '/admin'
],
'urlManager' => [
        'enablePrettyUrl' => true,
        'showScriptName' => false,
],
-------------------------

Step 4 (Optional, if doesn't work till step three) 

create .htaccess file in web directory
-------------------------
RewriteEngine On 
RewriteCond %{REQUEST_FILENAME} !-f 
RewriteCond %{REQUEST_FILENAME} !-d 
RewriteRule ^(.*)$ /index.php?/$1 [L]
-------------------------

Note: make sure you have enabled your mod rewrite in apache

Thats it! You can try your project with 
www.project.com/admin, www.project.com

in local server
localhost/project_name/admin, localhost/project_name

http://stackoverflow.com/questions/28118691/yii2-htaccess-how-to-hide-frontend-web-and-backend-web-completely

The best step by step instruction.
Thanks :)

great article!
thanks

Thanks. it works on localhost but not work on online host. what's the solution?

It works smoothly. found the step by step instructions.

Great Article...
Nice Step by step Instructions...

Perfect step by step... Great Article.... Thank you Ery Camel