command.php

<?php namespace Console;
use Symfony\Component\Console\Command\Command as SymfonyCommand;
use Symfony\Component\Console\Input\InputArgument;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Input\InputOption;
use Symfony\Component\Console\Output\OutputInterface;

/**
 * Author: Chidume Nnamdi <kurtwanger40@gmail.com>
 */
class Command extends SymfonyCommand
{
    
    public function __construct()
    {
        parent::__construct();
    }
    protected function greetUser(InputInterface $input, OutputInterface $output)
    {
        // outputs multiple lines to the console (adding "\n" at the end of each line)
        $output -> writeln([
            '====**** User Greetings Console App ****====',
            '==========================================',
            '',
        ]);
        
        // outputs a message without adding a "\n" at the end of the line
        $output -> write($this -> getGreeting() .', '. $input -> getArgument('username'));
    }
    private function getGreeting()
    {
        /* This sets the $time variable to the current hour in the 24 hour clock format */
        $time = date("H");
        /* Set the $timezone variable to become the current timezone */
        $timezone = date("e");
        /* If the time is less than 1200 hours, show good morning */
        if ($time < "12") {
            return "Good morning";
        } else
        /* If the time is grater than or equal to 1200 hours, but less than 1700 hours, so good afternoon */
        if ($time >= "12" && $time < "17") {
            return "Good afternoon";
        } else
        /* Should the time be between or equal to 1700 and 1900 hours, show good evening */
        if ($time >= "17" && $time < "19") {
            return "Good evening";
        } else
        /* Finally, show good night if the time is greater than or equal to 1900 hours */
        if ($time >= "19") {
            return "Good night";
        }        
    }
}