Req #53038 [Opn->Sus]: Enhancement / change to array_flip() with boolean values
Edit report at https://bugs.php.net/bug.php?id=53038&edit=1
ID: 53038
Updated by: cmb@php.net
Reported by: phplists at stanvassilev dot com
Summary: Enhancement / change to array_flip() with boolean
values
-Status: Open
+Status: Suspended
Type: Feature/Change Request
Package: Arrays related
PHP Version: 5.3.3
Block user comment: N
Private report: N
New Comment:
This feature would have very limited usefulness, since in case of
more than two boolean values, elements would inevitably
overwritten. If you, or anybody else, still feels that this would
be a generally useful improvement, please write to the internals
mailing list to start a discussion. For the time being, I'm
suspending this ticket.
Previous Comments:
------------------------------------------------------------------------
[2010-10-10 22:55:59] phplists at stanvassilev dot com
Description:
------------
This is not a bug, but I propose a change to how array_flip operates with
boolean values, in order to improve common use cases, because:
1) The current behavior (warning and completely empty array) renders arrays with
one or more boolean values invalid for flipping so they have to be manually
filtered in advance.
2) When true/false are cast to 1/0, all loose type checks against the keys will
match (i.e. true == 1, false == 0) which makes the cast also a practical one for
real utility.
3) The change will make the casting behavior of array_flip consistent with the
*already* existing behavior in the following example:
// casts booleans to int, and produces: array(1 => 123, 0 => 321);
$a = array(); $a[true] = 123; $a[false] = 321;
Test script:
---------------
var_dump(
array_flip(
array('foo' => true, 'bar' => false)
)
);
Expected result:
----------------
array(2) { [1]=> string(3) "foo" [0]=> string(3) "bar" }
Actual result:
--------------
Warning: array_flip() [function.array-flip]: Can only flip STRING and INTEGER
values! in ... on line 2
array(0) { }
------------------------------------------------------------------------
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Edit this bug report at https://bugs.php.net/bug.php?id=53038&edit=1
Thread (2 messages)