1. Install composer
Either by apt or by using installation wizards. It’s easy.
2. Install Lumen
composer global require "laravel/lumen-installer"
3. Create the project.
Navigate to the directory which you want to be the parent of the directory containing the project and run:
composer create-project --prefer-dist laravel/lumen <your directory>
The directory does not have to be in htdocs (or other equivalent directory of your server)
4. Create a symbolic link in htdocs of Apache
Either with ln -s or mklink.
ln -s /projects/php/<your directory> /xampp/htdocs/<your directory>