ID: 27059
User updated by: uno at venus dot dti dot ne dot jp
Reported By: uno at venus dot dti dot ne dot jp
Status: Wont fix
Bug Type: Scripting Engine problem
Operating System: *
PHP Version: 4CVS, 5CVS
New Comment:
Sure. I understand backward compatibility is important. Accuracy of
language specification also.
If development team take this behaviour not a bug, I suppose that
definition of variable name in the manual needs a little more
clarification.
Previous Comments:
------------------------------------------------------------------------
[2004-01-29 09:13:25] [EMAIL PROTECTED]
No matter how much it would slow down the exection, I
think we ought to maintain the backwards compatibility
as I know there are several scripts that depend on the
behaviour.
------------------------------------------------------------------------
[2004-01-29 00:00:42] uno at venus dot dti dot ne dot jp
Fmm...
When you read ${''} (or $x->{''}) without assigning, PHP notices
'Undefeined variable(property): in ...' on current implementation. So I
suppose that checks need to be added only when assiging new dynamic
variable and performance problem may be not too heavy.
------------------------------------------------------------------------
[2004-01-28 21:37:59] [EMAIL PROTECTED]
It would be too slow to add checks for the various strange
things you can do inside {}, simply because these checks
would need to occur realtime vs script parsing time.
------------------------------------------------------------------------
[2004-01-27 10:17:09] uno at venus dot dti dot ne dot jp
Description:
------------
Variable or object property can be made with empty name.
This behaviour doesn't match the manual.
http://www.php.net/manual/en/language.variables.php
Variable names follow the same rules as other labels in PHP.
A valid variable name starts with a letter or underscore,
followed by any number of letters, numbers, or underscores.
As a regular expression, it would be expressed thus:
'[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*'
http://www.php.net/manual/en/language.oop.php
A class is a collection of variables and functions working
with these variables.
Reproduce code:
---------------
<?php
error_reporting(E_ALL);
${''} = 'abc';
echo ${''};
class X{
}
$x = new X;
$x->{''} = 'def';
echo $x->{''};
?>
Expected result:
----------------
Error. (warning or notice are acceptable for me)
Actual result:
--------------
abcdef
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Edit this bug report at http://bugs.php.net/?id=27059&edit=1
