class method visibility

[Jeremy Wei <shuimuqingshu@xxxxxxxxx>]

I read the manual about  method visibility, but i can't understand the
code below:
<?php
class Bar
{
    public function test() {
        $this->testPrivate();
        $this->testPublic();
    }

    public function testPublic() {
        echo "Bar::testPublic\n";
    }

    private function testPrivate() {
        echo "Bar::testPrivate\n";
    }
}

class Foo extends Bar
{
    public function testPublic() {
        echo "Foo::testPublic\n";
    }

    private function testPrivate() {
        echo "Foo::testPrivate\n";
    }
}

$myFoo = new foo();
$myFoo->test(); // Bar::testPrivate
                     // Foo::testPublic
?>

in class Bar's method test, why "$this->testPrivate();"  invoked
testPrivate method of class Bar,
but not the testPrivate of class Foo?  here $this shoud be the
reference of the instance of class Foo,
isn't it?


--
JeremyWei（魏志锋，字静之）
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