Laravel | Is it safe to use the same APP_KEY in the env file of multiple webpages?

I'm running a Laravel based PHP website with no access to console(Since I'm using shared space..). I'm basically replicating my files/folders/database to 5 different subdomains(within same root domain) for some specific use-cases. Without running PHP artisan commands i'm not sure how to generate new APP_KEY within the .env file.

Thus i'm using the same APP_KEY in all 5 replicated subdomains... Is it safe ?? Or is there anyway to generate a new APP_KEY from web without the console ???

via Chebli Mohamed