Edit report at http://bugs.php.net/bug.php?id=47623&edit=1
ID: 47623 Comment by: laruence at yahoo dot com dot cn Reported by: Henry at huis-stijl dot nl Summary: array_shift() fails with @ operator Status: Verified Type: Bug Package: Scripting Engine problem Operating System: * PHP Version: 5.*, 6CVS (2009-04-30) New Comment: Hi, I found the same bug in php 5.2.8(linux) and I also find out why: in php complie phase, @$var -> expr_without_variable; //code expr_without_variable: ... | '@' { zend_do_begin_silence(&$1 TSRMLS_CC); } expr { zend_do_end_silence(&$1 TSRMLS_CC); $$ = $3; } while: $var -> variable then this different cause the znode's difference // non_empty_function_call_parameter_list: expr_without_variable { Z_LVAL($$.u.constant) = 1; zend_do_pass_param(&$1, ZEND_SEND_VAL, Z_LVAL($$.u.constant) TSRMLS_CC); } | variable { Z_LVAL($$.u.constant) = 1; zend_do_pass_param(&$1, ZEND_SEND_VAR, Z_LVAL($$.u.constant) TSRMLS_CC); } then in zend_so_pass_param: ZEND_SEND_VAR gen opcode:"SEND_REF", ZEND_SEND_VAR gen opcode:"SEND_VAR_NO_REF" so when use @, cause param send without ref. you can find more info on : http://www.laruence.com/2010/05/28/1565.html Previous Comments: ------------------------------------------------------------------------ [2010-05-05 20:56:31] whatrevolution at yahoo dot com <?php $_SESSION['villas'] = array ( 1 => array(1,2,3), 2 => array(2,3,4), 3 => array(3,4,5), 4 => array(4,5,6), ); /* * ONE: */ /* While(@$_SESSION['villas'] != array()) { $row = array_shift(@$_SESSION['villas']); print_r($row); }// einde while */ /* * TWO: */ /* while($foo['villas'] != array()) { $row = array_shift(@$foo['villas']); // Removing @ makes it work.. var_dump($foo); } */ /* * THREE: */ //I cann bypass this failure by using: $arr_temp = @$_SESSION['villas']; $row = array_shift($arr_temp); $_SESSION['villas'] = $arr_temp; unset($arr_temp); var_dump($_SESSION['villas']); ?> Result: One and Two, same as described before. Three: array 0 => array 0 => int 2 1 => int 3 2 => int 4 1 => array 0 => int 3 1 => int 4 2 => int 5 2 => array 0 => int 4 1 => int 5 2 => int 6 PHP Version 5.2.10-2ubuntu6.4 System Linux 2.6.31-20-generic x86_64 Build Date Jan 6 2010 22:36:47 Server API Apache 2.0 Handler PHP API 20041225 PHP Extension 20060613 Zend Extension 220060519 Debug Build no Thread Safety disabled Zend Memory Manager enabled Apache/2.2.12 (Ubuntu) ------------------------------------------------------------------------ [2009-04-13 18:23:01] j...@php.net This has nothing to do with sessions. Simplified script: <?php $foo['villas'] = array('a','b','c'); while($foo['villas'] != array()) { $row = array_shift(@$foo['villas']); // Removing @ makes it work.. var_dump($foo); } ?> ------------------------------------------------------------------------ [2009-03-16 22:11:28] Henry at huis-stijl dot nl Tried with and without the @ same output. ------------------------------------------------------------------------ [2009-03-16 16:26:07] j...@php.net If you remove those @'s, what does it output..? ------------------------------------------------------------------------ [2009-03-11 14:07:22] Henry at huis-stijl dot nl <?php session_start(); ini_set('session.cache_limiter', 'private'); // © 2009 Huis-stijl, Henry Hekman $_SESSION['villas'] = array ( 1 => array(1,2,3), 2 => array(2,3,4), 3 => array(3,4,5), 4 => array(4,5,6), ); While(@$_SESSION['villas'] != array()) { $row = array_shift(@$_SESSION['villas']); print_r($row); }// einde while ?> on php 4 i get Array ( [0] => 1 [1] => 2 [2] => 3 ) Array ( [0] => 2 [1] => 3 [2] => 4 ) Array ( [0] => 3 [1] => 4 [2] => 5 ) Array ( [0] => 4 [1] => 5 [2] => 6 ) on phph 5.2.9 i get a loop that doesnt end Array ( [0] => 1 [1] => 2 [2] => 3 ) Array ( [0] => 1 [1] => 2 [2] => 3 ) Array ( [0] => 1 [1] => 2 [2] => 3 ) Array ( [0] => 1 [1] => 2 [2] => 3 ) Array ( [0] => 1 [1] => 2 [2] => 3 ) Array ( [0] => 1 [1] => 2 [2] => 3 ) Array ( [0] => 1 [1] => 2 [2] => 3 ) Array ( [0] => 1 [1] => 2 [2] => 3 ) Array ( [0] => 1 [1] => 2 [2] => 3 ) Array ( [0] => 1 [1] => 2 [2] => 3 ) Array ( [0] => 1 [1] => 2 [2] => 3 ) Array ( [0] => 1 [1] => 2 [2] => 3 ) Array ( [0] => 1 [1] => 2 [2] => 3 ) ------------------------------------------------------------------------ The remainder of the comments for this report are too long. To view the rest of the comments, please view the bug report online at http://bugs.php.net/bug.php?id=47623 -- Edit this bug report at http://bugs.php.net/bug.php?id=47623&edit=1