From: halmai at nexum dot hu
Operating system: Linux
PHP version: 4.3.10
PHP Bug Type: Feature/Change Request
Bug description: $this in static context
Description:
------------
I have two classes with one function respectively.
In any function the variable $this should mean
- the instance of the class if this function was called as a function of
an instance of _that_ class, and
- it should be undefined (null) if called as a static function.
My problem is that if I call a static function of a class A from a
non-static function of class B then in the member function of class A the
variable $this denotes the instance of the class B instead of being null.
The fact that in a function of class A the variable $this denotes an
instance of class B is really confusing. If it was called statically then
$this should be null.
I know that this is described as normal behaviour but I think this is a
useless and senseless feature. In case of accepting my suggestion it would
be easy to decide whether a function was called in a static or non-static
context.
Reproduce code:
---------------
class A {
function what_am_i() {
if ( $this === null ) {
print "i am not an instance<br>";
} else {
print "i am an instance from the class '".get_class( $this
)."'.<br>";
}
}
}
class B {
function wrapper() {
A::what_am_i();
}
}
A::what_am_i(); // i am not an instance (this is OK)
$a = new A();
$a -> what_am_i(); // i am an instance from the class 'a'. (this is OK)
$b = new B();
$b -> wrapper(); // i am an instance from the class 'b'. (this should
output not an instance)
Expected result:
----------------
i am not an instance
i am an instance from the class 'a'.
i am not an instance
Actual result:
--------------
i am not an instance
i am an instance from the class 'a'.
i am an instance from the class 'b'.
--
Edit bug report at http://bugs.php.net/?id=33361&edit=1
--
Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=33361&r=trysnapshot4
Try a CVS snapshot (php5.0):
http://bugs.php.net/fix.php?id=33361&r=trysnapshot50
Try a CVS snapshot (php5.1):
http://bugs.php.net/fix.php?id=33361&r=trysnapshot51
Fixed in CVS: http://bugs.php.net/fix.php?id=33361&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=33361&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=33361&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=33361&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=33361&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=33361&r=support
Expected behavior: http://bugs.php.net/fix.php?id=33361&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=33361&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=33361&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=33361&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=33361&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=33361&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=33361&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=33361&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=33361&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=33361&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=33361&r=mysqlcfg
