From: plyrvt at mail dot ru
Operating system: any
PHP version: 5.1.6
PHP Bug Type: Variables related
Bug description: Unpredictable behaviour of references
Description:
------------
Depending on context, references can have 3 different behaviours:
1. Reference to element of an array. Element becomes reference
automatically until that reference exist.
1a. Whole array is passed 'by value' and keys of array copy can be
modified independently
1b. Element of an array can not be passed 'by value'. It is forced to be
passed by reference.
2. Reference to regular variable. Variable does not become reference and
can be passed 'by value'
Reproduce code:
---------------
<?php
function bla1($param){ $param['k1']="new!"; }
function bla2($param){ $param="new!";}
$a['k1']='foo';;
echo var_dump($a);
echo "<hr>";
$v=&$a['k1'];
echo var_dump($a);
echo "<hr>";
bla2($a['k1']);
echo var_dump($a);
echo "<hr>";
bla1($a);
echo var_dump($a);
echo "<hr>";
unset($v);
echo var_dump($a);
echo "<hr>";
$k1='foo';
echo var_dump($k1);
echo "<hr>";
$v=&$k1;
echo var_dump($k1);
echo "<hr>";
bla2($k1);
echo var_dump($k1);
echo "<hr>";
unset($v);
echo var_dump($k1);
?>
Expected result:
----------------
any predictable output
Actual result:
--------------
array(1) { ["k1"]=> string(3) "foo" }
array(1) { ["k1"]=> &string(3) "foo" }
array(1) { ["k1"]=> &string(3) "foo" }
array(1) { ["k1"]=> &string(4) "new!" }
array(1) { ["k1"]=> string(4) "new!" }
--------------
string(3) "foo"
string(3) "foo"
string(3) "foo"
string(3) "foo"
--
Edit bug report at http://bugs.php.net/?id=39276&edit=1
--
Try a CVS snapshot (PHP 4.4):
http://bugs.php.net/fix.php?id=39276&r=trysnapshot44
Try a CVS snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=39276&r=trysnapshot52
Try a CVS snapshot (PHP 6.0):
http://bugs.php.net/fix.php?id=39276&r=trysnapshot60
Fixed in CVS: http://bugs.php.net/fix.php?id=39276&r=fixedcvs
Fixed in release:
http://bugs.php.net/fix.php?id=39276&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=39276&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=39276&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=39276&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=39276&r=support
Expected behavior: http://bugs.php.net/fix.php?id=39276&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=39276&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=39276&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=39276&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=39276&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=39276&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=39276&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=39276&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=39276&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=39276&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=39276&r=mysqlcfg
