After installing XAMPP and creating index.php, I try open my index.php but write error: 
Access forbidden!
You don't have permission to access the requested directory. There is either no index document or the directory is read-protected.
If you think this is a server error, please contact the webmaster.
Error 403
chat1.by Apache/2.4.9 (Win32) OpenSSL/1.0.1g PHP/5.5.11
File httpd-vhosts.conf:
NameVirtualHost *:80
 <VirtualHost *:80>
    DocumentRoot "C:\xampp\htdocs"
    ServerName localhost
 </VirtualHost>
  <VirtualHost *:80>
    DocumentRoot "C:\xampp\htdocs\PHPProjects\chat.by"
    ServerName chat.by
  <Directory "C:\xampp\htdocs\PHPProjects\chat.by">
    Order allow,deny
    Allow from all
  </Directory>
</VirtualHost>
  <VirtualHost *:80>
    DocumentRoot "C:\Projects\PHP\chat.by"
    ServerName chat1.by
  <Directory "C:\Projects\PHP\chat.by">
    Order allow,deny
    Allow from all
  </Directory>
</VirtualHost>
But site chat1.by open normal. May be I need add path "C:\Projects\PHP\chat.by" somewhere else?
File hosts:
127.0.0.1       chat.by
127.0.0.1       chat1.by
 
    