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Request #60408 Array/String element access on instantiation (same like class member in 5.4RC)
Submitted: 2011-11-29 12:06 UTC Modified: 2012-04-17 02:11 UTC
Votes:5
Avg. Score:4.8 ± 0.4
Reproduced:5 of 5 (100.0%)
Same Version:3 (60.0%)
Same OS:4 (80.0%)
From: bugzilla33 at gmail dot com Assigned: laruence (profile)
Status: Closed Package: Scripting Engine problem
PHP Version: 5.4.0RC2 OS:
Private report: No CVE-ID: None
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 [2011-11-29 12:06 UTC] bugzilla33 at gmail dot com 
Description:
------------
Please add array constructor dereferencing support

like JavaScript, C# and all languages excluding PHP 5.4

Test script:
---------------
<?php

 $i=0;
 print(array('pa','th')[$i++]); // pa
 print(['wa','ss'][$i++]); // ss

?>

Expected result:
----------------
Parse error: syntax error, unexpected '[' in C:\htdocs\test.pl\array.php on line 4

Actual result:
--------------
pass

Patches

const_dereference_002.phpt (last revision 2011-11-30 09:46 UTC by laruence@php.net)
const_dereference_003.phpt (last revision 2011-11-30 09:46 UTC by laruence@php.net)
const_dereference_001.phpt (last revision 2011-11-30 09:46 UTC by laruence@php.net)
req60408.patch (last revision 2011-11-30 09:45 UTC by laruence@php.net)

Pull Requests

History

AllCommentsChangesGit/SVN commitsRelated reports
 [2011-11-29 12:08 UTC] felipe@php.net
-Type: Bug +Type: Feature/Change Request
 [2011-11-29 14:40 UTC] bugzilla33 at gmail dot com 
20 Jun 2011, PHP 5.4.0 Alpha 1 -> Added array dereferencing support. (Felipe)
11 Nov 2011, PHP 5.4.0 RC1 -> Added class member access on instantiation (e.g. (new foo)->bar()) support. (Felipe)

Many thanks for Felipe.
It would be nice to add: Array element access on instantiation
array()[$x] and [][$x]

Then everything would be fully useful, but not in part.
 [2011-11-29 14:42 UTC] bugzilla33 at gmail dot com
-Summary: Array constructor dereferencing support +Summary: Array element access on instantiation (same like class member in 5.4RC)
 [2011-11-29 14:42 UTC] bugzilla33 at gmail dot com 
(edit summary)
 [2011-11-30 06:04 UTC] laruence@php.net 
see https://wiki.php.net/rfc/constdereference
 [2011-11-30 07:29 UTC] bugzilla33 at gmail dot com 
>> echo array(1, 2, 3)[0]; //output 1
>> echo "foobar"[2]; //output o
>> echo "foobar"["foo"][0] // output f
>> works.

Excellent! Have you tested it with short array constructor?
echo [1, 2, 3][0]; //output 1


Are there any opportunities to make it public in the final PHP 5.4?
 [2011-11-30 07:36 UTC] laruence@php.net 
support (of course).

yes, but it need to be disscussd first ;)
 [2011-11-30 07:47 UTC] bugzilla33 at gmail dot com
-Summary: Array element access on instantiation (same like class member in 5.4RC) +Summary: Array/String element access on instantiation (same like class member in 5.4RC)
 [2011-11-30 07:47 UTC] bugzilla33 at gmail dot com 
/Summary change/ Array -> Array/String
 [2011-11-30 08:40 UTC] lunter at interia dot pl 
I'm all for it.

example: short switch/case alternative
--------------------------------------

<?php

echo 'ABC'[$i]
// or
echo ['A','B','C'][$i]

?>

is equivalent to long:

<?php

switch ($i) {
    case 0:
        echo "A";
        break;
    case 1:
        echo "B";
        break;
    case 2:
        echo "C";
        break;
}

?>
 [2011-11-30 08:55 UTC] laruence@php.net 
Dmitry, could you look at this please? thanks
patch and test list in: https://wiki.php.net/rfc/constdereference

All existing test passed.
 [2011-11-30 08:55 UTC] laruence@php.net
-Assigned To: +Assigned To: dmitry
 [2011-11-30 09:45 UTC] laruence@php.net 
The following patch has been added/updated:

Patch Name: req60408.patch
Revision:   1322646333
URL:        https://bugs.php.net/patch-display.php?bug=60408&patch=req60408.patch&revision=1322646333
 [2011-11-30 09:46 UTC] laruence@php.net 
The following patch has been added/updated:

Patch Name: const_dereference_001.phpt
Revision:   1322646369
URL:        https://bugs.php.net/patch-display.php?bug=60408&patch=const_dereference_001.phpt&revision=1322646369
 [2011-11-30 09:46 UTC] laruence@php.net 
The following patch has been added/updated:

Patch Name: const_dereference_003.phpt
Revision:   1322646387
URL:        https://bugs.php.net/patch-display.php?bug=60408&patch=const_dereference_003.phpt&revision=1322646387
 [2011-11-30 09:46 UTC] laruence@php.net 
The following patch has been added/updated:

Patch Name: const_dereference_002.phpt
Revision:   1322646398
URL:        https://bugs.php.net/patch-display.php?bug=60408&patch=const_dereference_002.phpt&revision=1322646398
 [2011-12-27 09:36 UTC] dmitry@php.net 
I would say the patch is wrong. It misses the possibility of container_ptr separation in zend_fetch_dimension_address_read(). It also won't work with ZEND_FETCH_DIM_FUNC_ARG.
 [2011-12-27 09:36 UTC] dmitry@php.net
-Assigned To: dmitry +Assigned To: laruence
 [2011-12-27 09:41 UTC] laruence@php.net 
dmitry, thanks very much for pointing that out, I will try to fix these issues. :)
 [2012-04-17 02:11 UTC] laruence@php.net
-Status: Assigned +Status: Closed
 [2012-04-17 02:11 UTC] laruence@php.net 
This bug has been fixed in SVN.

Snapshots of the sources are packaged every three hours; this change
will be in the next snapshot. You can grab the snapshot at
http://snaps.php.net/.

 For Windows:

http://windows.php.net/snapshots/
 
Thank you for the report, and for helping us make PHP better.

committed into trunk.
 [2012-07-06 13:07 UTC] bugzilla33 at gmail dot com 
When it will be available in final version of PHP?
 
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