dgoguerra

Laravel's Dependency Injection Container in Depth

Laravel has a powerful Inversion of Control (IoC) / Dependency Injection (DI) Container. Unfortunately the official documentation doesn't cover all of the available functionality, so I decided to experiment with it and document it for myself. The following is based on Laravel 5.4.26 - other versions may vary.

Introduction to Dependency Injection

I won't attempt to explain the principles behind DI / IoC here - if you're not familiar with them you might want to read What is Dependency Injection? by Fabien Potencier (creator of the Symfony framework).

Accessing the Container

dgoguerra

tail -f -n 450 storage/logs/laravel*.log \
  | grep -i -E \
    "^\[\d{4}\-\d{2}\-\d{2} \d{2}:\d{2}:\d{2}\]|Next [\w\W]+?\:" \
    --color

dgoguerra

# Get Sudo.
if [ $EUID != 0 ]; then
    sudo "$0" "$@"
    exit $?
fi

# Install Xcode first - https://itunes.apple.com/us/app/xcode/id497799835?ls=1&mt=12
# Install Xcode command line tools.
xcode-select --install

dgoguerra

# Recently I had to send a password to someone over Skype. Since that's obviously not a good idea, I asked for 
# the person's public SSH RSA key, and used it to encrypt the password itself.


# Convert the public key into PEM format
ssh-keygen -f path/to/id_rsa.pub -e -m pem > ~/id_rsa.pub.pem

# Using the public pem file to encrypt a string
echo "sometext" | openssl rsautl -encrypt -pubin -inkey ~/id_rsa.pub.pem > ~/encrypted.txt