Online PHP editor | refs for r65qn

@ 2014-10-30T17:29:13Z

<?php
abstract class A {
  public static function get() {
    static $instance = null;
    if ($instance === null) {
      $instance = new static();
    }
    return $instance;
  }
}

final class B extends A {
}

final class C extends A {
}

var_dump(B::get());
var_dump(C::get());