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

From: phpqa at mathieuviau dot com Operating system: Ubuntu 14.04.2 LTS PHP version: 7.0.0alpha2 Package: Scripting Engine problem Bug Type: Bug Bug description:Losing globals and super-globals randomly when using frames. 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 bug report at https://bugs.php.net/bug.php?id=70040&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=70040&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=70040&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=70040&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=70040&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=70040&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=70040&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=70040&r=needscript Try newer version: https://bugs.php.net/fix.php?id=70040&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=70040&r=support Expected behavior: https://bugs.php.net/fix.php?id=70040&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=70040&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=70040&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=70040&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=70040&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=70040&r=dst IIS Stability: https://bugs.php.net/fix.php?id=70040&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=70040&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=70040&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=70040&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=70040&r=mysqlcfg