#36191 [Bgs]: statement as function parameter gets evaluated after calling the function
| From: | mail dot spam at gmx dot net | Date: | Mon, 30 Jan 2006 07:52:57 +0000 |
| Subject: | #36191 [Bgs]: statement as function parameter gets evaluated after calling the function | ||
| References: | 1 | Groups: | php.bugs |
| Request: | Send a blank email to php-bugs+get-92614@lists.php.net to get a copy of this message | ||
ID: 36191
User updated by: mail dot spam at gmx dot net
Reported By: mail dot spam at gmx dot net
Status: Bogus
Bug Type: *General Issues
Operating System: Windows
PHP Version: 5.1.2
New Comment:
Thanks for your replay, I reread the manual and found the line you
meant
But I still think it's a bug:
This code:
---------
function test_func(&$test_param) {
echo 'inside before:';
print_r($test_param);
$test_param[] = 2;
echo 'inside after:';
print_r($test_param);
}
echo '<pre>';
echo 'outside before function call:';
print_r($test_array);
test_func($test_array = array(1));
echo 'outside after function call:';
print_r($test_array);
echo '</pre>';
---------
displays the following:
---------
outside before function call:
Notice: Undefined variable: test_array in <filename goes here> on line
13
inside before:Array
(
[0] => 1
)
inside after:Array
(
[0] => 1
[1] => 2
)
outside after function call:Array
(
[0] => 1
)
---------
As you can see the expression I try to pass as argument gets evaluated
twice.
One time before calling the function itself (which is the behaviour
like in all earlier version) and a second time after returning from the
function call
If the expression got evaluated only one time (after returning from
function call) I'ld say its ok, you changed things a little bit.
But as you seem to execute the code two times I can't imagine why you
added this second execution?
Previous Comments:
------------------------------------------------------------------------
[2006-01-29 16:08:52] sniper@php.net
Thank you for taking the time to write to us, but this is not
a bug. Please double-check the documentation available at
http://www.php.net/manual/ and the instructions on how to
report
a bug at http://bugs.php.net/how-to-report.php
------------------------------------------------------------------------
[2006-01-28 14:01:59] mail dot spam at gmx dot net
Description:
------------
if you use a statement as actual parameter for a function (parameter is
called by reference) the statement get's executed after calling the
function thus overwriting the function's work
Reproduce code:
---------------
function test_array(&$test) {
$test[] = 2;
}
echo '<pre>';
test_array($test_1);
test_array($test_2 = array(1));
$test_3 = array(1);
test_array($test_3);
print_r($test_1);
print_r($test_2);
print_r($test_3);
echo 'PHP-Version: '.phpversion();
echo '</pre>';
Expected result:
----------------
Array
(
[0] => 2
)
Array
(
[0] => 1
[1] => 2
)
Array
(
[0] => 1
[1] => 2
)
Actual result:
--------------
output for version 4.3.11
Array
(
[0] => 2
)
Array
(
[0] => 1
[1] => 2
)
Array
(
[0] => 1
[1] => 2
)
output for version 5.1.2
Array
(
[0] => 2
)
Array
(
[0] => 1
)
Array
(
[0] => 1
[1] => 2
)
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/?id=36191&edit=1