7. Data Persistence

Activity 7.1: Contact Management Application

Solution

Let's discuss the new or changed items, from the most uncoupled ones to the most complex ones.

A good start here is the User model class since this class will be invoked on every page for authenticated users; let's put this file inside the src/models/ directory:

1. Create the src/models/User.php file and add the following content.
2. After declaring the namespace and imports (the use keyword), we define the properties of the User class, giving names similar to the column names of the users table from the database:

   <?php 
   declare(strict_types=1);
   namespace Models;
   use DateTime;
   class User
   {
       /** @var int */
       private $id;
       /** @var string */
       private $username;
       /** @var string */
       private $password;
       /** @var DateTime */
    ...