ID: 30074 Comment by: mikael at SPAMMENOTchl dot chalmers dot se Reported By: owen dot beresford at murphx dot com Status: Open Bug Type: Scripting Engine problem Operating System: linux PHP Version: 5.0.1 New Comment:
That should read "I belive this bug was backported into PHP 4.3.10", it seems to be present in the newly released 4.3.10 but not in 4.3.9 Previous Comments: ------------------------------------------------------------------------ [2004-12-20 22:07:41] mikael at SPAMMENOTchl dot chalmers dot se I belive this bug was introduced in PHP 4.3.10, it would seem that when doing EXTR_REFS $a in the example below isn't SEPARATE_ZVAL_TO_MAKE_IS_REF or something when being extracted from the array. Reproduce code: ------------ $a = 1; $b = 1; $arr = array('acopy' => $a, 'bref' => &$b); extract($arr, EXTR_REFS); $acopy++; $bref++; debug_zval_dump($a, $b, $arr, $acopy, $bref); Expected result (As seen on PHP < 4.3.10): ------------ $a: long(1) refcount(2) $b: long(2) refcount(1) $arr: array(2) refcount(2){ ["acopy"]=> &long(2) refcount(2) ["bref"]=> &long(2) refcount(3) } $acopy: long(2) refcount(1) $bref: long(2) refcount(1) Actual result: -------------- $a: long(2) refcount(1) $b: long(2) refcount(1) $arr: array(2) refcount(2){ ["acopy"]=> &long(2) refcount(3) ["bref"]=> &long(2) refcount(3) } $acopy: long(2) refcount(1) $bref: long(2) refcount(1) ------------------------------------------------------------------------ [2004-11-28 16:34:08] [EMAIL PROTECTED] Reduced reproduce code looks like this: <?php $result = extract(array('a'=>1, 'b'=>$foo), EXTR_REFS); //extract(array('a'=>1, 'b'=>$foo), EXTR_REFS); // they are not the same var_dump(array($b)); ?> ------------------------------------------------------------------------ [2004-09-14 11:10:56] owen dot beresford at murphx dot com I have noticed my code output has the wrong indexes. the expected out put should read index 0 and index 1 not index 'a', index 'b' bug still present ------------------------------------------------------------------------ [2004-09-13 15:47:40] owen dot beresford at murphx dot com Description: ------------ PHP 5.0.1 (cli) (built: Aug 16 2004 23:07:06), linux, rh7.3, kernel2.4, libc-2.2.5 The extract function seems incomplete/ broken. I have a code base which uses arguments arrays, like perl. Inorder to alter varaibles inside the parameter array in a convient fashion, I extract the variables at the top of the methods. Some of the boundary cases don't perform correctly. I have NOT experienced this under other releases of php, so assume the problem is induced by the new zend engine. I am assuming that php 5.0.1 includes prevous fixes for errors reported against php 4.3.8 and php 5.0.0 (there are closed cases with similar problems). This is a small simple case, there are other failures, but this would exceed the twenty line limit. will post an URL with full senario The described output ommited some of the english statements for brevity. I have not tested this under other operating systems, but this is not a platform dependant function (well it shouldn't be), and I don't have any to hand. in the interests of thoroughness: Configure Command => './configure' '--prefix=/usr' '--with-config-file-path=/etc' '--enable-cli' '--disable-cgi' '--without-pear' '--enable-force-cgi-redirect' '--with-exec-dir=/usr/bin' '--with-mysql' '--with-curl=/usr/local/lib' '--with-zlib' '--enable-sockets' '--with-openssl' '--enable-pcntl' '--enable-libxml' '--enable-shared' Reproduce code: --------------- function x($args) { $count =extract($args, EXTR_REFS); echo("inside function x()\n$count items\n"); $count+=10; echo("altered count to $count\n"); var_dump(array($a, $b)); } echo("before function x() (second is a null)\n"); $a=array('a'=>1, 'b'=>NULL); var_dump($a); x($a); echo("before function x() (second is undefined variable)\n"); $d=array('a'=>1, 'b'=>NULL); $e=array('a'=>1, 'b'=>$d['d']); var_dump($e); x($e); Expected result: ---------------- array(2) { ["a"]=> int(1) ["b"]=> NULL } array(2) { ["a"]=> int(1) ["b"]=> NULL } Actual result: -------------- array(2) { [0]=> int(1) [1]=> NULL } array(2) { [0]=> int(1) [1]=> int(12) } ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=30074&edit=1