#42839 [Opn->Bgs]: Assigning array values inside foreach and array pointer

ID: 42839 Updated by: tony2001@php.net Reported By: denis at edistar dot com -Status: Open +Status: Bogus Bug Type: Scripting Engine problem Operating System: Linux PHP Version: 5.2.4 New Comment: Array internal pointer position after foreach() depens on a dozen parameters and in general is undefined. The newer version of the docs makes it clear: -- Note: Unless the array is referenced, foreach operates on a copy of the specified array and not the array itself. foreach has some side effects on the array pointer. Don't rely on the array pointer during or after the foreach without resetting it. http://docs.php.net/foreach -- Previous Comments: ------------------------------------------------------------------------ [2007-11-12 11:10:27] denis at edistar dot com The problem still persist. Using the example now the results are: $parameters key before foreach: a $parameters key after foreach: b $parameters key before foreach: b $parameters key after foreach: b and not the expected results: $parameters key before foreach: a $parameters key after foreach: a $parameters key before foreach: a $parameters key after foreach: a ------------------------------------------------------------------------ [2007-11-12 10:36:16] tony2001@php.net Please try using this CVS snapshot: http://snaps.php.net/php5.2-latest.tar.gz For Windows (zip): http://snaps.php.net/win32/php5.2-win32-latest.zip For Windows (installer): http://snaps.php.net/win32/php5.2-win32-installer-latest.msi ------------------------------------------------------------------------ [2007-10-03 14:37:29] denis at edistar dot com Description: ------------ In PHP 5.2.4 when I set array values inside a foreach, the array pointer is moved to the second element of the array or, better, to the element after the first modified element of the array. In PHP 5.2.3 the array pointer was not moved. Moreover this does not happen if i assign the array elements outside the foreach. Reproduce code: --------------- $parameters = array( 'a' => 1, 'b' => 2, 'c' => 3, 'd' => 4 ); echo "\$parameters key before foreach: " . key($parameters) . "\n"; foreach($parameters as $key => $value) { $parameters[$key] = "s" . $value; } echo "\$parameters key after foreach: " . key($parameters) . "\n"; echo "\$parameters key before foreach: " . key($parameters) . "\n"; $parameters['a'] = "s" . 1; $parameters['b'] = "s" . 2; $parameters['c'] = "s" . 3; $parameters['d'] = "s" . 4; echo "\$parameters key after foreach: " . key($parameters) . "\n"; Expected result: ---------------- $parameters key before foreach: a $parameters key before foreach: a $parameters key before foreach: a $parameters key before foreach: a Actual result: -------------- $parameters key before foreach: a $parameters key before foreach: b $parameters key before foreach: a $parameters key before foreach: a ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=42839&edit=1