Apache sites-available default and other - php

Question

i have a domain name called for example "mydomain.com"
<VirtualHost *:80>
ServerAdmin webmaster#localhost
DocumentRoot /var/www
<Directory />
Options -Indexes FollowSymLinks
AllowOverride None
</Directory>
<Directory /var/www/>
Options -Indexes FollowSymLinks MultiViews
AllowOverride None
Order allow,deny
allow from all
</Directory>
....
</VirtualHost>
When i write the following address in url:
www.mydomain.com/mysubdomain/myfolder
go to a web page working fine.
mysubdomain sites-available is the following, called mysubdomain
<VirtualHost *:80>
DocumentRoot /var/www/mysubdomain
ServerName www.mysubdomain.com
ServerAlias mysubdomain.com
ErrorLog ${APACHE_LOG_DIR}/error_mysubdomain.log
# Possible values include: debug, info, notice, warn, error, crit,
# alert, emerg.
LogLevel warn
CustomLog ${APACHE_LOG_DIR}/access_mysubdomain.log combined
<Directory /var/www/mysubdomain>
Options -Indexes FollowSymLinks MultiViews
AllowOverride All
Order allow,deny
allow from all
</Directory>
</VirtualHost>
Everything works fine, when i type www.mydomain.com/mysubdomain/myfolder goes fine to
www.mydomain.com/mysubdomain/myfolder/login.php
but when i write
http://www.mysubdomain.com/myfolder/login.php
don´t work as expected, because when i include in login.php a ref, like ../../myfolder can´t go to root folder as i expected, how can i fix it ?
in www.mydomain.com/mysubdomain/myfolder/login.php the ref like ../../myfolder go fine to /var/www/
i want that the url showing to user could be http://www.mysubdomain.com/myfolder/login.php

Answer 1

Relative URLs are relative to the URL, not to the file system on the web server (which is invisible to the client).
You can't navigate up the directory tree to a file which doesn't appear under the web root for the virtual host being viewed.

Answer 2

The solution is simple:
change the file mysubdomain that is in sites-available to
DocumentRoot /var/www/mysubdomain
ServerName www.mysubdomain.com
ServerAlias mysubdomain.com
ErrorLog ${APACHE_LOG_DIR}/error_mysubdomain.log
# Possible values include: debug, info, notice, warn, error, crit,
# alert, emerg.
LogLevel warn
CustomLog ${APACHE_LOG_DIR}/access_mysubdomain.log combined
Alias /myfolder /var/www/myfolder
<Directory /var/www/mysubdomain>
Options -Indexes FollowSymLinks MultiViews
AllowOverride All
Order allow,deny
allow from all
</Directory>