From: wf at bitplan dot com
Operating system: WindowsXP
PHP version: 5.0.0RC1
PHP Bug Type: Class/Object related
Bug description: $this / instanceof issue with static calls of instance functions
Description:
------------
I am using PHP5 RC2 (couldn't yet select it - have downloaded it a few
minutes ago ...) on Windows XP Professional with Apache2.0.49.
This bug is similar to #20089 but I'm complaining more about the
instanceof issue. The true fix is of course fixing #20089 first. Saying
"This is not a bug" is not a good thing with the goal of better object
orientation for PHP5 ...
When calling an instance function ("->" needed) as a class function ("::")
this should either be an error or instanceof for the given class should
fail - it looks like
a) instanceof returns "" instead of FALSE/0 when
this is not the correct instance
b) when calling an instance function of another class in a static way this
should be an error
Reproduce code:
---------------
<?php
class Foo
{
function __construct () { echo 'Generating a Foo object <br />'; }
function getInstance () { return new Foo(); }
function operation () { echo "Foo operation this is a
".get_Class($this)."<br>";
echo "This is a Foo: ".$this instanceof
Foo."<br>"; }
function baroperation () { Bar::operation(); }
}
class Bar
{
function __construct () { echo 'Generating a Bar object <br />'; }
function getInstance () { return new Bar(); }
function operation () { echo "Bar operation this is a
".get_Class($this)."<br>";
echo "This is a Bar: ".$this instanceof
Bar."<br>"; }
function fooOperation () { Foo::operation(); }
}
$foo = Foo::getInstance();
$bar = Bar::getInstance();
$foo->operation();
$bar->operation();
$foo->baroperation();
$bar->foooperation();
Foo::operation();
Bar::operation();
?>
Expected result:
----------------
Generating a Foo object
Generating a Bar object
Foo operation this is a Foo
This is a Foo: 1
Bar operation this is a Bar
This is a Bar: 1
error Bar operation but this is a Foo
This is a Bar: 0
error Foo operation but this is a Bar
This is a Foo: 0
Foo operation this is a nil
This is a Foo: 0
Bar operation this is a nil
This is a Bar: 0
Actual result:
--------------
Generating a Foo object
Generating a Bar object
Foo operation this is a Foo
This is a Foo: 1
Bar operation this is a Bar
This is a Bar: 1
Bar operation this is a Foo
This is a Bar:
Foo operation this is a Bar
This is a Foo:
Foo operation this is a
This is a Foo:
Bar operation this is a
This is a Bar:
--
Edit bug report at http://bugs.php.net/?id=28145&edit=1
--
Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=28145&r=trysnapshot4
Try a CVS snapshot (php5): http://bugs.php.net/fix.php?id=28145&r=trysnapshot5
Fixed in CVS: http://bugs.php.net/fix.php?id=28145&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=28145&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=28145&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=28145&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=28145&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=28145&r=support
Expected behavior: http://bugs.php.net/fix.php?id=28145&r=notwrong
Not enough info: http://bugs.php.net/fix.php?id=28145&r=notenoughinfo
Submitted twice: http://bugs.php.net/fix.php?id=28145&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=28145&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=28145&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=28145&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=28145&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=28145&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=28145&r=float
