From: sweiss at stylesight dot com
Operating system: Debian
PHP version: 5.3.0
PHP Bug Type: Class/Object related
Bug description: Cannot define class constant with constant value
Description:
------------
In the PHP documentation it states:
"It is possible to define constant values on a per-class basis
remaining the same and unchangeable. Constants differ from normal
variables in that you don't use the $ symbol to declare or use them.
"The value must be a constant expression, not (for example) a
variable, a class member, result of a mathematical operation or a
function call."
This is however not entirely the case.
If you define a constant within a class based on another constant, it
will not work, despite the fact that it is a constant value.
In the given example, X_CONST . "Y" is a constant composed of two
other constants - no variables, class members, math expressions, or
function calls.
And, in fact, for normal, non-class constants, this is totally
possible:
define("Y_CONST", X_CONST . "Y");
is totally valid.
At the very least the documentation should be updated to reflect
simply that a class constant may only be defined as a simple scalar
value, and not just any constant expression.
Reproduce code:
---------------
define("X_CONST", "Const");
class TestClass {
const Y_CONST = X_CONST . "Y";
function test() {
return self::Y_CONST;
}
}
$a = new TestClass();
var_dump($a->test());
Expected result:
----------------
(string) "ConstY"
Actual result:
--------------
Parse error: syntax error, unexpected '.', expecting ',' or ';' in line
5
--
Edit bug report at http://bugs.php.net/?id=49431&edit=1
--
Try a snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=49431&r=trysnapshot52
Try a snapshot (PHP 5.3):
http://bugs.php.net/fix.php?id=49431&r=trysnapshot53
Try a snapshot (PHP 6.0):
http://bugs.php.net/fix.php?id=49431&r=trysnapshot60
Fixed in SVN:
http://bugs.php.net/fix.php?id=49431&r=fixed
Fixed in SVN and need be documented:
http://bugs.php.net/fix.php?id=49431&r=needdocs
Fixed in release:
http://bugs.php.net/fix.php?id=49431&r=alreadyfixed
Need backtrace:
http://bugs.php.net/fix.php?id=49431&r=needtrace
Need Reproduce Script:
http://bugs.php.net/fix.php?id=49431&r=needscript
Try newer version:
http://bugs.php.net/fix.php?id=49431&r=oldversion
Not developer issue:
http://bugs.php.net/fix.php?id=49431&r=support
Expected behavior:
http://bugs.php.net/fix.php?id=49431&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=49431&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=49431&r=submittedtwice
register_globals:
http://bugs.php.net/fix.php?id=49431&r=globals
PHP 4 support discontinued: http://bugs.php.net/fix.php?id=49431&r=php4
Daylight Savings: http://bugs.php.net/fix.php?id=49431&r=dst
IIS Stability:
http://bugs.php.net/fix.php?id=49431&r=isapi
Install GNU Sed:
http://bugs.php.net/fix.php?id=49431&r=gnused
Floating point limitations:
http://bugs.php.net/fix.php?id=49431&r=float
No Zend Extensions:
http://bugs.php.net/fix.php?id=49431&r=nozend
MySQL Configuration Error:
http://bugs.php.net/fix.php?id=49431&r=mysqlcfg
