From: andrea at 3site dot it
Operating system: Windows XP
PHP version: 5.2.6RC3
PHP Bug Type: Feature/Change Request
Bug description: class name as defined constant
Description:
------------
It seems to be an ambiguity issue and a probable future problem.
You can create a class and define a constant with the same name and
vice-versa.
Who is the class and who is the constant?
For future problems: currently, the magic __toString method works as magic
instance method even if it is declared as public static ( ... and inherited
in instances as public without static ... but this is another problem ... )
If one day PHP would like to support a public static __toString method this
ambiguity will be a problem to understand if we are trying to get them, or
the possible defined constant.
Reproduce code:
---------------
class Test{}
define('Test', 123);
// defined('Test') or class_exists('Test') ?
define('Test2', 'Test2');
class Test2{}
get_class(new Test2) === Test2; // true
echo Test2; // Test2
$ref = Test2;
new $ref; // an instanceof Test2 ...
is_string(Test2); // true
Expected result:
----------------
A fatal error, because a constant should be a unique and immutable value
with a name that could not be used as class one and a class should be
unique as well (if we cannot use the same name for two different classes,
how can we have two totally different meaning with a sngle name, the class
and the constant)
Actual result:
--------------
It is possible to create a class and then define a constant with the same
name, and it is possible to define a constant and then a class with the
same name.
--
Edit bug report at http://bugs.php.net/?id=44568&edit=1
--
Try a CVS snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=44568&r=trysnapshot52
Try a CVS snapshot (PHP 5.3):
http://bugs.php.net/fix.php?id=44568&r=trysnapshot53
Try a CVS snapshot (PHP 6.0):
http://bugs.php.net/fix.php?id=44568&r=trysnapshot60
Fixed in CVS: http://bugs.php.net/fix.php?id=44568&r=fixedcvs
Fixed in release:
http://bugs.php.net/fix.php?id=44568&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=44568&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=44568&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=44568&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=44568&r=support
Expected behavior: http://bugs.php.net/fix.php?id=44568&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=44568&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=44568&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=44568&r=globals
PHP 4 support discontinued: http://bugs.php.net/fix.php?id=44568&r=php4
Daylight Savings: http://bugs.php.net/fix.php?id=44568&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=44568&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=44568&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=44568&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=44568&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=44568&r=mysqlcfg
