Managing instance by using traits

Best.php

<?php

/**
 * Example class
 */
class Best
{
  use Manager;
  
  public $name;

  function __construct ($name)
  {
    $this->add($name);
    $this->name = $name;
  }

}

Manager.php

<?php

/**
 * Save instances staticly
 * per class without having
 * to extend or add code
 * to all classes you want
 * to save the instances of
 */
trait Manager
{
  protected static $instances;

  protected function add ($name)
  {
    self::$instances[$name] = $this;  
  }

  public function get ($name = null)
  {
    if ($name != null)
    {
      return self::$instances[$name];
    }

    return self::$instances;
  }
}

Test.php

<?php

/**
 * Example class
 */
class Test
{
  use Manager;

  public $name;

  function __construct ($name)
  {
    $this->add($name);
    $this->name = $name;
  }

}