Here are the steps you can follow to develop a birthday reminder and greeting module in an existing member table using the date_of_birth field in Laravel 8:

1. Create a new command by running the following artisan command:

This will create a new file app/Console/Commands/SendBirthdayGreetings.php.

2. In the handle method of the SendBirthdayGreetings Command, retrieve the members who have their birthday today. You can use the whereDate method of the query builder to filter the members by their date_of_birth field:

3. Loop through the members and send a birthday greeting to each member using your preferred method (e.g. email, SMS).
4. Schedule the command to run every day at midnight using the schedule method of the Kernel class in app/Console/Kernel.php:

That’s it! You now have a birthday reminder and greeting module in your Laravel app.