Storing Objects in Arrays in OOP in PHP

Suppose we have the following class User:

User.php<?php
  class User
  {
    public $name;
    public $age;
    
    public function __construct($name, $age)
    {
      $this->name = $name;
      $this->age = $age;
    }
  }
?>

Let's connect the file with our class to the index.php file:

index.php<?php
  require_once 'User.php';
?>

Let's create three objects of our class:

index.php<?php
  $user1 = new User('john', 21);
  $user2 = new User('eric', 22);
  $user3 = new User('kyle', 23);
?>

Now let's add the objects we created into the $users array:

index.php<?php
  $user1 = new User('john', 21);
  $user2 = new User('eric', 22);
  $user3 = new User('kyle', 23);
  
  $users[] = $user1;
  $users[] = $user2;
  $users[] = $user3;
  
  var_dump($users);
?>

We can shorten our code by getting rid of the variables:

index.php<?php
  $users[] = new User('john', 21);
  $users[] = new User('eric', 22);
  $users[] = new User('kyle', 23);
  
  var_dump($users);
?>

We can shorten the code even more by immediately creating an array of objects:

index.php<?php
  $users = [
    new User('john', 21),
    new User('eric', 22),
    new User('kyle', 23)
  ];
  
  var_dump($users);
?>

Now let's loop through our array of objects and display the object properties on the screen:

index.php<?php
  foreach ($users as $user) {
    echo $user->name . ' ' . $user->age . '<br>';
  }
?>