In the above example (#3) in order to make it work, you can change the child's method from 'private' to 'protected' (or public) and it will be called through 'static'.
<?php
class A {
private function foo() {
echo "success!\n";
}
public function test() {
$this->foo();
static::foo();
}
}
class B extends A {
/* foo() will be copied to B, hence its scope will still be A and
* the call be successful */
}
class C extends A {
protected function foo() { //note the change here
echo 'hello world!';
}
}
$b = new B();
$b->test();
$c = new C();
$c->test(); // 'success' 'hello world'
?>