- var_dump: documentation ( source)
<?php
class A {
static $instance;
public static function instance() {
return static::$instance ?: ( static::$instance = new static() );
}
public function foo() {
var_dump($this);
}
}
class B extends A {
}
class C extends A {
static $instance;
}
A::instance()->foo();
B::instance()->foo();
C::instance()->foo();