install_codeigniter(){
    sudo wget https://github.com/bcit-ci/CodeIgniter/archive/3.1.9.zip
    sudo unzip 3.1.9.zip
    sudo rm 3.1.9.zip
    sudo mv -v CodeIgniter-3.1.9/* $PWD
    sudo rm -r CodeIgniter-3.1.9
    echo 'CodeIgniter 3.1.9 installed'
}