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Doc Bug #42384 Foreach Referencing Problem
Submitted: 2007-08-22 16:21 UTC Modified: 2007-11-21 17:28 UTC
Votes:2
Avg. Score:5.0 ± 0.0
Reproduced:1 of 1 (100.0%)
Same Version:1 (100.0%)
Same OS:1 (100.0%)
From: jw at coffeecup dot com Assigned:
Status: Not a bug Package: Documentation problem
PHP Version: 5.2.3 OS: OS X
Private report: No CVE-ID: None
View Developer Edit
 [2007-08-22 16:21 UTC] jw at coffeecup dot com 
Description:
------------
I get a syntax error when I cast the array_expression portion of a foreach loop to an array while using the & operator on the value portion.

Reproduce code:
---------------
$arr = array(1, 2, 3, 4);
foreach ((array)$arr as &$value) {
    $value = $value * 2;
}

print_r($arr);

Expected result:
----------------
Array
(
    [0] => 2
    [1] => 4
    [2] => 6
    [3] => 8
)

Actual result:
--------------
Parse error: syntax error, unexpected '&', expecting T_STRING or T_VARIABLE or '$'

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 [2007-08-22 16:38 UTC] johannes@php.net 
Thank you for taking the time to write to us, but this is not
a bug. Please double-check the documentation available at
http://www.php.net/manual/ and the instructions on how to report
a bug at http://bugs.php.net/how-to-report.php

The value created by (array)$arr is a temporary variable which can\'t be referenced.
 [2007-08-22 16:45 UTC] jw at coffeecup dot com 
Then shouldn't I get this error: 

Fatal error: Cannot create references to elements of a temporary array expression
 [2007-08-23 10:32 UTC] jani@php.net 
No, you get compile time error for invalid syntax. Reclassified.
 [2007-11-21 17:28 UTC] vrana@php.net 
Already documented: "This is possible only if iterated array can be referenced (i.e. is variable)."
 
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