How to Send Daily SMS Reminders in PHP 7 Laravel Web Apps with cron

$ composer create-project laravel/laravel reminder-app

Package manifest generated successfully.
> @php artisan key:generate --ansi
Application key set successfully.

$ cd reminder-app

$ composer require twilio/sdk

Using version ^5.36 for twilio/sdk
./composer.json has been updated
Loading composer repositories with package information
Updating dependencies (including require-dev)
Package operations: 1 install, 0 updates, 0 removals
  - Installing twilio/sdk (5.36.0): Downloading (100%)         
twilio/sdk suggests installing guzzlehttp/guzzle (An HTTP client to execute the API requests)
Writing lock file
Generating optimized autoload files
> Illuminate\Foundation\ComposerScripts::postAutoloadDump
> @php artisan package:discover --ansi
Discovered Package: beyondcode/laravel-dump-server
Discovered Package: fideloper/proxy
Discovered Package: laravel/tinker
Discovered Package: nesbot/carbon
Discovered Package: nunomaduro/collision
Package manifest generated successfully.

TWILIO_ACCOUNT_SID=ACxxxxxxxxxxxx  # found on Twilio.com/console
TWILIO_AUTH_TOKEN=yyyyyyyyyyyyyyy  # found on Twilio.com/console
TWILIO_PHONE_NUMBER=+12029026420  # your Twilio number                             
TO_NUMBER=+14155550909  # the number to send reminders to

$ php artisan make:model Reminder

<?php                                                                                                              

namespace App;

use Illuminate\Database\Eloquent\Model;
use Twilio\Rest\Client;

class Reminder extends Model
{
    /**
    * send Twilio SMS
    *
    * @param $to
    * @param $sms_body
    */
    function sendSMS( $to, $sms_body ) {
        // Your Account SID and Auth Token from twilio.com/console
        $sid    = getenv( 'TWILIO_ACCOUNT_SID' );
        $token  = getenv( 'TWILIO_AUTH_TOKEN' );
        $client = new Client( $sid, $token );
        $client->messages->create(
             $to,
             [
             // A Twilio phone number you purchased at twilio.com/console
             'from' => getenv( 'TWILIO_PHONE_NUMBER' ),
             // the body of the text message you'd like to send
             'body' => $sms_body
             ]
        );
    }
}

<?php                                                                              

namespace App;

use Illuminate\Database\Eloquent\Model;
use Twilio\Rest\Client;

class Reminder extends Model
{
    /**
    * send Twilio SMS
    *
    * @param $to
    * @param $sms_body
    */
    function sendSMS( $to, $sms_body ) {
        // Your Account SID and Auth Token from twilio.com/console
        $sid    = getenv( 'TWILIO_ACCOUNT_SID' );
        $token  = getenv( 'TWILIO_AUTH_TOKEN' );
        $client = new Client( $sid, $token );
        $client->messages->create(
             $to,
             [
             // A Twilio phone number you purchased at twilio.com/console
             'from' => getenv( 'TWILIO_PHONE_NUMBER' ),
             // the body of the text message you'd like to send
             'body' => $sms_body
             ]
        );
    }


    public function sendReminders() {
        // Fill in a reminder you'd like to send in this function, either populated
        //  by a constant or from the database.
        $reminder = "This is your daily reminder. Get it done!";
        $recipients = [
            [ 'to' => getenv('TO_NUMBER') ]
            // add additional recipients here, if necessary
        ];
        foreach($recipients as $recipient) {
            $this->sendSMS($recipient['to'], $reminder);
        }
    }
}

$ php artisan make:command sendReminders

<?php                                                                                 

namespace App\Console\Commands;

use Illuminate\Console\Command;
use App\Reminder;

class sendReminders extends Command
{
    /** 
     * The name and signature of the console command.
     *
     * @var string
     */
    protected $signature = 'send:reminders';

    /** 
     * The console command description.
     *
     * @var string
     */
    protected $description = 'Send reminder(s) via SMS using Twilio.';

    /** 
     * Create a new command instance.
     *
     * @return void
     */
    public function __construct()
    {   
        parent::__construct();
    }   

    /** 
     * Execute the console command.
     *
     * @return mixed
     */
    public function handle()
    {   
        $reminder=new Reminder();
        $reminder->sendReminders();
        $this->info('Success! Check your messages.');
    }   
}

$ php artisan send:reminder

Success! Check your messages.

<?php

namespace App\Console;

use Illuminate\Console\Scheduling\Schedule;
use Illuminate\Foundation\Console\Kernel as ConsoleKernel;

class Kernel extends ConsoleKernel
{
    /** 
     * The Artisan commands provided by your application.
     *
     * @var array
     */
    protected $commands = [ 
        //  
    ];  

    /** 
     * Define the application's command schedule.
     *
     * @param  \Illuminate\Console\Scheduling\Schedule  $schedule
     * @return void
     */
    protected function schedule(Schedule $schedule)
    {  
        $schedule->command('send:reminder')->dailyAt('6:00');                                                              
    }

    /** 
     * Register the commands for the application.
     *
     * @return void
     */
    protected function commands()
    {   
        $this->load(__DIR__.'/Commands');

        require base_path('routes/console.php');
    }
}

$ crontab -e

* * * * * cd /path-to-your-project && php artisan schedule:run >> /dev/null 2>&1