Question

In this code:

class Foo {
  private $foo;
  public function Foo($foo) {
    $this->foo = $foo;
  }
  public function getFoo() {
    return $this->foo;
  }
}

$a = new Foo(new Foo('bar'));

echo $a->getFoo()->getFoo();

In old php I’ll coudn’t call second getFoo I’ll need to assign it to some variable. Which version of php added this feature?

Answer 1

In old php I’ll coudn’t call second getFoo I’ll need to assign it to some variable. Which version of php added this feature?

Maybe in a really old PHP version. It wouldn’t work in PHP 4, because returning $this->foo would return by value, and not by reference. Returning &$this->foo would work though. Since PHP 5.0 (if I recall correctly), objects are always returned by reference, so the code above should work without problems in PHP >= 5.