From: kenashkov at gmail dot com
Operating system: Fedora Core 4
PHP version: Irrelevant
PHP Bug Type: Documentation problem
Bug description: allow_call_time_pass_reference - Actually is still possible
to pass argument by
Description:
------------
Quote from the docs about the php.ini directive
"allow_call_time_pass_reference":
"Whether to enable the ability to force arguments to be passed by
reference at function call time. ... "
According to the docs in the second case (=Off) it must warn and _pass by
value_. But in both cases (=On =Off) the argument is passed by reference.
Wheter the docs are incorrect - it should stand something like:
" Whether to warn when arguments are passed by reference at function call
time. ..."
or it is an internal PHP problem.
In my opinion the call time pass reference is still useful in two cases:
1) serializing recursive arrays:
<?
$arr1[0] =& $arr1;
print_r(unserialize(serialize($arr1)));
?>
expected:
Array
(
[0] => Array
*RECURSION*
)
actual:
Array
(
[0] => Array
(
[0] =>
)
)
This can be solved using:
print_r(unserialize(serialize(&$arr1))) , which is deprecated, or
print_r(unserialize(serialize($ref=&$arr1))), which returns almost as
expected:
Array
(
[0] => Array
(
[0] => Array
*RECURSION*
)
)
In fact it is the same, although PHP does show the recursion one level
deeper.
2) When counting the references to an object. The following code prints
the cound of the clones of the object:
<?
class test{}
$obj1 = new test();
$obj2 = $obj1;
debug_zval_dump($obj1);//object(test)(0) refcount(3){ }
?>
And to count the references to the object we must use:
<?
class test{}
$obj1 = new test();
$ref1 =& $obj1;
debug_zval_dump(&$obj1);//object(test)(0) refcount(3){ }
?>
Reproduce code:
---------------
<?
/* allow_call_time_pass_reference=Off; */
function test($arg1)
{
$arg1 = 55;
}
$var1 = 44;
test(&$var1);
print $var1;
?>
Expected result:
----------------
44
Actual result:
--------------
55
/* + PHP warning ... */
--
Edit bug report at http://bugs.php.net/?id=35487&edit=1
--
Try a CVS snapshot (PHP 4.4):
http://bugs.php.net/fix.php?id=35487&r=trysnapshot44
Try a CVS snapshot (PHP 5.1):
http://bugs.php.net/fix.php?id=35487&r=trysnapshot51
Try a CVS snapshot (PHP 6.0):
http://bugs.php.net/fix.php?id=35487&r=trysnapshot60
Fixed in CVS: http://bugs.php.net/fix.php?id=35487&r=fixedcvs
Fixed in release:
http://bugs.php.net/fix.php?id=35487&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=35487&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=35487&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=35487&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=35487&r=support
Expected behavior: http://bugs.php.net/fix.php?id=35487&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=35487&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=35487&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=35487&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=35487&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=35487&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=35487&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=35487&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=35487&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=35487&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=35487&r=mysqlcfg
