RewriteEngine On
RewriteBase /
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{SERVER_PORT} 80
RewriteRule ^.*$ https://www.%{SERVER_NAME}%{REQUEST_URI} [R=301,L]
RewriteRule ^admin/([0-9a-zA-Z-_]+)/?(([0-9]+)?)(/?)$    admin/index.php?s=$1 [L,QSA]