ID: 39901
Updated by: [EMAIL PROTECTED]
Reported By: schizoduckie at gmail dot com
-Status: Open
+Status: Bogus
Bug Type: Variables related
Operating System: Win32/XP
PHP Version: 5CVS-2006-12-20 (snap)
New Comment:
It does not matter whether you cast the variables or not, switch()
always uses semantics similar to "==".
Again, there is nothing wrong and we're not going to change it.
Previous Comments:
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[2006-12-20 13:34:25] schizoduckie at gmail dot com
I disagree with this bug being bogus.
Once you start giving people the power of casting, this type of
programming should be either consistently be possible to use throughout
the PHP or be completely removed to avoid any misunderstandings.
------------------------------------------------------------------------
[2006-12-20 13:25:29] schizoduckie at gmail dot com
I agree that this is expected behavior for loosly typed variables. but
i am CASTING explicity to String because i want it to be treated as
string, which should trigger the switch to work as ===
------------------------------------------------------------------------
[2006-12-20 13:20:45] [EMAIL PROTECTED]
switch() construct uses "==" semantics to compare values, which
compares numeric strings as numbers:
var_dump("0123"=="123"); => true
If you want to compare numeric strings as strings, use "===":
var_dump("0123"==="123"); => false.
This is expected behaviour.
------------------------------------------------------------------------
[2006-12-20 13:16:41] schizoduckie at gmail dot com
Description:
------------
In a switch, a value that is declared as string with a prefix 0 will
automatically disappear in switched values, even if all of them are
specifically casted as a string.
Reproduce code:
---------------
$field = (string)"0123";
settype($field, 'string'); // just to make sure, for testcase
switch ($field)
{
case '123': $result = 'first'; break;
case '456': $result = 'second'; break;
default: $result = 'third'; break;
}
echo $result; // first, due to string / int conversion.
switch ((string)$field) // explicit cast to string
{
case (string)'123': $result = 'first'; break; // more (unneccesary
casts just to be sure)
case (string)'456': $result = 'second'; break;
default: $result = 'third'; break;
}
echo $result; // first! ????
Expected result:
----------------
I would have expected the last result echo to be third because of the
explicit typecasting.
This problem appears in all php versions up to 5.2 snapshot of today.
Actual result:
--------------
the code in the example speaks for itself.
------------------------------------------------------------------------
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Edit this bug report at http://bugs.php.net/?id=39901&edit=1
