是否可以打包和分发基于Laravel的项目及其所有依赖项?

My client cannot install anything besides what is available via Debian packages, and so installing Composer is not an option (unless a Laravel / Composer package exists).

The best solution would be if the client could just unzip the project along with all of its (Laravel, Composer) dependencies and it would just work.

Is something like this possible to achieve? How?

The best solution would be if the client could just unzip the project along with all of its (Laravel, Composer) dependencies and it would just work.

Yes - this will work

Is something like this possible to achieve? How?

Like you said - if you have the project running on your directory - just zip it up (including the /vendors folder) - and they can unzip it. There is no need to "install" Laravel.

Once unzipped - the client should still be able to run php artisan migrate to do the database table migrations

Edit: actually - why cant they just run

php -r "readfile('https://getcomposer.org/installer');" | php

or

curl -sS https://getcomposer.org/installer | php

Its not a package - but its installed via PHP? See composer install docs for more info.