From: e at narod dot ru
Operating system: Windows XP
PHP version: 5.0.3
PHP Bug Type: Scripting Engine problem
Bug description: array_shift() modifies array passed by value from class method
Description:
------------
Function array_shift() modifies array passed by value from class method.
In the example below $_cache is modified through array_shift() call though
$_cache is always passed by value.
The bug doesn't appear if we don't use classes.
Reproduce code:
---------------
class A {
var $_cache = false;
function get_array() {
if (!$this->_cache) $this->_cache = array(1, 2, 3, 4, 5);
return $this->_cache;
}
function get_shifted_array() {
return array_shift($this->get_array());
}
}
$a = new A;
for ($i = 0; $i < 5; $i++)
echo $a->get_shifted_array() . "\n";
Expected result:
----------------
1
1
1
1
1
Actual result:
--------------
1
2
3
4
5
--
Edit bug report at http://bugs.php.net/?id=31762&edit=1
--
Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=31762&r=trysnapshot4
Try a CVS snapshot (php5.0):
http://bugs.php.net/fix.php?id=31762&r=trysnapshot50
Try a CVS snapshot (php5.1):
http://bugs.php.net/fix.php?id=31762&r=trysnapshot51
Fixed in CVS: http://bugs.php.net/fix.php?id=31762&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=31762&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=31762&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=31762&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=31762&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=31762&r=support
Expected behavior: http://bugs.php.net/fix.php?id=31762&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=31762&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=31762&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=31762&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=31762&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=31762&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=31762&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=31762&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=31762&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=31762&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=31762&r=mysqlcfg
