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behaviour of static calls to regular methods

php.internals

Ard Biesheuvel

22 years ago

Is the fact that the following code works intentional ?

class S {
function func() {
A::meth();
}
}

class A {
private $bar;

function meth() {
$this->bar="bar";
}

function func() {
S::func();
echo "$this->bar\n";

}
}


$a = new A;
$a->func();

... so A::$this is accessed through two static calls to different classes.

--
Ard

Johannes Schlueter

22 years ago

Hi,

yes, afaik it's intentional. This was made for making parent::foo() work.
Here's a shorter (at least a bit shorter *g*) example of this behavior:

<?php
class foo {
function a() {
bar::b();
}
}
class bar {
function b() {
var_dump($this);
}
}
$foo = new foo();
$foo->a(); // Calls bar::b()
?>

Prints:

object(foo)#1 (0) {
}

So in a static call $this holds the instance of the calling object.

johannes

Ard Biesheuvel wrote:

Andi Gutmans

22 years ago

Yeah for BC sake, but if you define the function's as static explicitly it
won't work.

At 01:54 PM 6/21/2004 +0200, Ard Biesheuvel wrote: