Bug #70040 [Opn->Fbk]: Losing globals and super-globals randomly when using frames.

Edit report at https://bugs.php.net/bug.php?id=70040&edit=1 ID: 70040 Updated by: kalle@php.net Reported by: phpqa at mathieuviau dot com Summary: Losing globals and super-globals randomly when using frames. -Status: Open +Status: Feedback Type: Bug Package: Scripting Engine problem Operating System: Ubuntu 14.04.2 LTS PHP Version: 7.0.0alpha2 Block user comment: N Private report: N Previous Comments: ------------------------------------------------------------------------ [2015-07-13 21:59:13] kalle@php.net Just curious, does this also happen in threaded versions of PHP? ------------------------------------------------------------------------ [2015-07-13 18:19:20] phpqa at mathieuviau dot com I just did reproduce this on a brand new vagrant box, when there are enough concurrent requests to the apache server. Simply spawn multiple processes issuing a bunch of requests to the same script URL, and some of them will consistently loose the globals. I used 12 parallel processes, each of them issuing 5k requests in a row, and each of the process will get the issue at least once. Btw, it still occurs with beta1. ------------------------------------------------------------------------ [2015-07-13 07:17:27] laruence@php.net if you don't have a way to reproduce it, then we can not do much things on this.. please, try to figure out a way of how to reproduce it , thanks very much. ------------------------------------------------------------------------ [2015-07-10 13:24:44] phpqa at mathieuviau dot com Description: ------------ I have this legacy application still using frames with the same init code for the main page and for each of the frames in the main page. Randomly, I get one or the other frames (not the main page) to loose information about some or all of the globals upon reloading the page multiple times. I could not reproduce this when using a page without frames. This is using the php7 module with apache2-mpm-prefork 2.4.7. It occurs in both Chrome and Firefox (latest versions) [PHP Modules] Core ctype curl date dom fileinfo filter gd hash iconv intl json libxml mbstring mysqli mysqlnd openssl pcre PDO pdo_mysql pdo_sqlite Phar posix Reflection session SimpleXML SPL sqlite3 standard tokenizer xml xmlreader xmlwriter [Zend Modules] Test script: --------------- Full set of source files available here: http://www.mathieuviau.com/php-test-globals.tgz ** init.php ** <?php error_reporting(E_ALL); ini_set('display_errors', true); if (isset($_SERVER['SCRIPT_NAME'])) { $a = explode('/', $_SERVER['SCRIPT_NAME']); } elseif (isset($HTTP_SERVER_VARS['SCRIPT_NAME'])) { $a = explode('/', $HTTP_SERVER_VARS['SCRIPT_NAME']); } else { var_dump(array_keys($GLOBALS)); var_dump($_SERVER); debug_print_backtrace(); $error = 'Unable to detect script environment.'; die($error); } Expected result: ---------------- In the frames pages, the $GLOBALS and $_SERVER variables must be always defined. Output should look like: Array ( [0] => _GET [1] => _POST [2] => _COOKIE [3] => _FILES [4] => GLOBALS [5] => _SERVER [6] => a ) Actual result: -------------- From time to time I do get either one of those results: Notice: Undefined variable: GLOBALS in /var/www/.../init.php on line 10 Warning: array_keys() expects parameter 1 to be array, null given in /var/www/.../init.php on line 10 NULL Notice: Undefined variable: _SERVER in /var/www/.../init.php on line 11 NULL #0 require() called at [/var/www/.../right_main.php:2] Unable to detect script environment. Or the following (less often): Notice: Undefined variable: GLOBALS in /var/www/.../right_main.php on line 11 Warning: array_keys() expects parameter 1 to be array, null given in /var/www/.../right_main.php on line 11 Or even (not very often, but still reproductible): array(5) { [0]=> string(4) "_GET" [1]=> string(5) "_POST" [2]=> string(7) "_COOKIE" [3]=> string(6) "_FILES" [4]=> string(7) "GLOBALS" } Notice: Undefined variable: _SERVER in /var/www/.../init.php on line 11 NULL #0 require() called at [/var/www/.../right_main.php:2] Unable to detect script environment. ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=70040&edit=1