Description:
------------
The page on Visibility states: "Private limits visibility only to the class that defines the item." Apparently, private methods may not be superseded by a child of that class; in the following code, a new object e inherits the __constructor() which calls "$this->df", but because f() is declared private, it is silently not overridden. This behavior may not constitute a "bug" in the context of PHP inheritance, but it deserves a warning message and/or some mention in the documentation.

Note that if f() is declared protected (or public) in both classes, inheritance works as expected; if the two f()s are declared with differing protection, an error message results, which is somewhat ironic considering the above-described silent failure mode.


Reproduce code:
---------------
class d {
 function __construct() {
  $this->f();
 }
 private function f() {
  echo "d->f()\n";
 }
}
class e extends d {
 private function f() {
  echo "e->f()\n";
 }
}
$t = new e();


Expected result:
----------------
e->f()

(Because $this refers to an instance of e when it is executed.)

Actual result:
--------------
d->f()