PHP Magical Setter and Getter

MagicUser.php

<?php

// once you add the magical setter and getter
// you can can access any private fields as usual
// but you can also develop custom setter and getter if you want
$user = new MagicUser();
$user->username = "test";
$user->password = "pass";
echo $user->username; // will print Test not test.

// magical setter and getter
class MagicUser{
  private $username;

  private $password;
  
  public function setUsername($username){
    $this->username = ucfirst($username);
  }

  public function __set($name , $value){
    $setter = 'set'.ucfirst($name);
    if(method_exists($this,$setter)){
      $this->$setter($value);
    }else{
      $this->$name = $value; 
    }
  }
  
  public function __get($name){
    $getter = 'get'.ucfirst($name);
    if(method_exists($this,$getter)){
      return $this->$getter();
    }else{
      return $this->$name;
    }
  }
}

User.php

<?php

// without magical setter and getter
// you forced to develop setter and getter methods for each private field 
$user = new User();
$user->setUsername("Mohammed");
echo $user->getUsername();

// regular setter and getter
class User{
  private $username;

  private $password;
  
  public function setUsername($username){
    $this->username = $username;
  }
  
  public function getUsername(){
    return $this->username;
  }
}

As you can see, I only add setUsername because I need to use ucfirst method or write any custom setter logic, but I did not add getUsername, setPassword or getPassword and I still can access these private method without any problem.

This way, I have the flexibility to add the setter and getter only and only if I have custom logic for setting or getting private field.