From: e dot sand at elisand dot com
Operating system: Irrelevant
PHP version: 5.2.9
PHP Bug Type: Feature/Change Request
Bug description: Allow foreach to iterate multiple arrays/objects similar to
for syntax
Description:
------------
Using the for construct, you are able to define/utilize multiple
variables:
for ($i = 0, $j = 10; $i < 10; $i++, $j--) {...}
I would like to propose that a similar syntax be allowed for the foreach
construct which would allow iterating over multiple arrays/objects at
once:
foreach ($array1 as $i => $a, $array2 as $j => $b) {...}
Such syntax and use would be useful when you have multiple arrays that are
related, such as may be found with $_POST data when submitting arrays of
values. For example, a form of inventory data where an id, name and
quantity may be submitted - all in individual arrays but the indexes/keys
would relate across arrays (id[0] -> name[0] -> quantity[0]).
In such an example, you could write a simple foreach iterator as:
foreach ($_POST['id'] as $key => $id, $_POST['name] as $name,
$_POST['quantity'] as $qty) {...}
This would save having to traditionally define $name and $qty within the
foreach loop like so:
$name = $_POST['name'][$key];
$qty = $_POST['quantity'][$key];
That is just a simple example however. As the proposed changes would
allow iterating over multiple arrays at once, it could indeed save
considerable lines of code.
The only issues to debate with regards to this proposition is what happens
if not all arrays being iterated have the same number of members. The
other issue is the syntax, should
http://bugs.php.net/bug.php?id=44530&edit=2 be considered - perhaps using ;
instead of , to separate the arrays would be simple enough.
--
Edit bug report at http://bugs.php.net/?id=47933&edit=1
--
Try a CVS snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=47933&r=trysnapshot52
Try a CVS snapshot (PHP 5.3):
http://bugs.php.net/fix.php?id=47933&r=trysnapshot53
Try a CVS snapshot (PHP 6.0):
http://bugs.php.net/fix.php?id=47933&r=trysnapshot60
Fixed in CVS:
http://bugs.php.net/fix.php?id=47933&r=fixedcvs
Fixed in CVS and need be documented:
http://bugs.php.net/fix.php?id=47933&r=needdocs
Fixed in release:
http://bugs.php.net/fix.php?id=47933&r=alreadyfixed
Need backtrace:
http://bugs.php.net/fix.php?id=47933&r=needtrace
Need Reproduce Script:
http://bugs.php.net/fix.php?id=47933&r=needscript
Try newer version:
http://bugs.php.net/fix.php?id=47933&r=oldversion
Not developer issue:
http://bugs.php.net/fix.php?id=47933&r=support
Expected behavior:
http://bugs.php.net/fix.php?id=47933&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=47933&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=47933&r=submittedtwice
register_globals:
http://bugs.php.net/fix.php?id=47933&r=globals
PHP 4 support discontinued: http://bugs.php.net/fix.php?id=47933&r=php4
Daylight Savings: http://bugs.php.net/fix.php?id=47933&r=dst
IIS Stability:
http://bugs.php.net/fix.php?id=47933&r=isapi
Install GNU Sed:
http://bugs.php.net/fix.php?id=47933&r=gnused
Floating point limitations:
http://bugs.php.net/fix.php?id=47933&r=float
No Zend Extensions:
http://bugs.php.net/fix.php?id=47933&r=nozend
MySQL Configuration Error:
http://bugs.php.net/fix.php?id=47933&r=mysqlcfg
