Install Laravel 4 with Ease

I edited your snippet above for L3 and composer.

# Install laravel and configure
install-laravel () {
 echo "Installing Laravel into '1ドル'"

 git clone https://github.com/laravel/laravel.git 1ドル
 cd 1ドル

 # Required for getting L4 dev
 # git reset --hard HEAD
 # git checkout develop

 # Do the house cleaning
 chmod -R 0777 storage
 curl -sS https://getcomposer.org/installer | php
 php composer.phar
 touch composer.json
 echo "{
 \"require\": {

 }
 }" > composer.json
 php composer.phar install
 php artisan key:generate
 rm -rf .git
}

Is 777 a good practice? Shouldn't it be 755?

There are some Laravel hosting platforms that has 1 click installation option. If you are gonna host your app, try using such a platform. This saves a lot of time and efforts.

Some Laravel hosting platforms offer a one-click installation feature. If you're going to host your app, consider choosing one of these platforms. This saves a significant amount of time and work.