Yii2 admin and frontend separated - yii2

Question

I red a lot of posts but still can't realize how should i separate them. I am talking about : www.mysite.com(frontend) and www.mysite.com/admin(backend). Tried also the way the documentation says it like
<VirtualHost *:80>
ServerName frontend.dev
DocumentRoot "/path/to/yii-application/frontend/web/"
<Directory "/path/to/yii-application/frontend/web/">
# use mod_rewrite for pretty URL support
RewriteEngine on
# If a directory or a file exists, use the request directly
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
# Otherwise forward the request to index.php
RewriteRule . index.php
# use index.php as index file
DirectoryIndex index.php
# ...other settings...
# Apache 2.4
Require all granted
## Apache 2.2
# Order allow,deny
# Allow from all
</Directory>
</VirtualHost>
<VirtualHost *:80>
ServerName backend.dev
DocumentRoot "/path/to/yii-application/backend/web/"
<Directory "/path/to/yii-application/backend/web/">
# use mod_rewrite for pretty URL support
RewriteEngine on
# If a directory or a file exists, use the request directly
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
# Otherwise forward the request to index.php
RewriteRule . index.php
# use index.php as index file
DirectoryIndex index.php
# ...other settings...
# Apache 2.4
Require all granted
## Apache 2.2
# Order allow,deny
# Allow from all
</Directory>
</VirtualHost>
but from all i red i think it is not the right way. Bagging you for help i am struggling from few hours already without result. Thank you in advance!

Answer 1

No need to write .htaccess , You can achieve this by changing your location of index.php from "frontend/web/index.php" to "/frontend/index.php" and code for index.php should.
<?php
defined('YII_DEBUG') or define('YII_DEBUG', true);
defined('YII_ENV') or define('YII_ENV', 'dev');
require(__DIR__ . '/../vendor/autoload.php');
require(__DIR__ . '/../vendor/yiisoft/yii2/Yii.php');
require(__DIR__ . '/../common/config/bootstrap.php');
require(__DIR__ . '/config/bootstrap.php');
$config = yii\helpers\ArrayHelper::merge(
require(__DIR__ . '/../common/config/main.php'),
require(__DIR__ . '/../common/config/main-local.php'),
require(__DIR__ . '/config/main.php'),
require(__DIR__ . '/config/main-local.php')
);
(new yii\web\Application($config))->run();
Same changes you can do in admin folder. Remember you need to rename your backend folder as "admin".
Also create a "Assets" folder parallel to index.php file . In our case there is already "assets" folder inside "frontend".So no need to create.