Composer installation requirements

I am trying to install composer to the laravel project. When im doing sudo composer install in projects directory it shows me two errors:

Problem 1
    - Installation request for simplesoftwareio/simple-qrcode dev-master -> satisfiable by simplesoftwareio/simple-qrcode[dev-master].
    - simplesoftwareio/simple-qrcode dev-master requires ext-gd * -> the requested PHP extension gd is missing from your system.
  Problem 2
    - Installation request for esendex/sdk ^1.3 -> satisfiable by esendex/sdk[v1.3.0].
    - esendex/sdk v1.3.0 requires ext-curl * -> the requested PHP extension curl is missing from your system.

I was checking how to install it and I found these commands:

1. composer require simplesoftwareio/simple-qrcode
2. composer require esendex/sdk

Anyway, they are giving me the same error. Is there anything I can do about it?

Answer

Looks like you have some PHP modules missing.

For PHP5

sudo apt-get install php5-curl
sudo apt-get install php5-gd

For PHP7

sudo apt-get install php7-curl
sudo apt-get install php7-gd

Packages may be different depending on your OS