Last modified: 2014-07-03 20:46:53 UTC
Although we get PHP warnings in the apache syslogs, we don't really get much information about it: Dec 13 18:30:43 10.0.11.48 apache2[9987]: PHP Warning: preg_match() expects parameter 2 to be string, array given in /usr/local/apache/common-local/php-1.21wmf6/extensions/FundraiserLandingPage/FundraiserLandingPage.php on line 96 Dec 13 18:30:43 10.0.2.198 apache2[24462]: PHP Warning: preg_match() expects parameter 2 to be string, array given in /usr/local/apache/common-local/php-1.21wmf6/extensions/FundraiserLandingPage/FundraiserLandingPage.php on line 96 We could do with recording more information (to a different log file on fluorine), like we do for both the fatal log and the exception logs
PHPUnit dumps warnings to the console... Warning: Invalid argument supplied for foreach() in /var/www/wiki/mediawiki/core/includes/objectcache/SqlBagOStuff.php on line 232 Call Stack: 0.0009 245936 1. {main}() /var/www/wiki/mediawiki/core/tests/phpunit/phpunit.php:0 2.0765 14629624 2. MediaWikiPHPUnitCommand::main() /var/www/wiki/mediawiki/core/tests/phpunit/phpunit.php:119 2.0767 14641960 3. MediaWikiPHPUnitCommand->run() /var/www/wiki/mediawiki/core/tests/phpunit/MediaWikiPHPUnitCommand.php:64 2.0767 14642440 4. PHPUnit_TextUI_Command->run() /var/www/wiki/mediawiki/core/tests/phpunit/MediaWikiPHPUnitCommand.php:80 7.3004 87363544 5. PHPUnit_TextUI_TestRunner->doRun() /usr/share/php/PHPUnit/TextUI/Command.php:176 7.3094 87684904 6. PHPUnit_Framework_TestSuite->run() /usr/share/php/PHPUnit/TextUI/TestRunner.php:349 7.4141 87686664 7. PHPUnit_Framework_TestSuite->run() /usr/share/php/PHPUnit/Framework/TestSuite.php:705 22.3535 178137936 8. PHPUnit_Framework_TestSuite->run() /usr/share/php/PHPUnit/Framework/TestSuite.php:705 22.3537 178139472 9. PHPUnit_Framework_TestSuite->runTest() /usr/share/php/PHPUnit/Framework/TestSuite.php:745 22.3537 178139952 10. MediaWikiTestCase->run() /usr/share/php/PHPUnit/Framework/TestSuite.php:775 22.3586 178141408 11. ApiQueryContinueTest->addDBData() /var/www/wiki/mediawiki/core/tests/phpunit/MediaWikiTestCase.php:109 23.4059 178284240 12. ApiTestCase->editPage() /var/www/wiki/mediawiki/core/tests/phpunit/includes/api/query/ApiQueryContinueTest.php:47 23.4063 178285904 13. WikiPage->doEditContent() /var/www/wiki/mediawiki/core/tests/phpunit/includes/api/ApiTestCase.php:56 23.5032 178306552 14. Title->getUserPermissionsErrors() /var/www/wiki/mediawiki/core/includes/WikiPage.php:1904 23.5032 178306736 15. Title->getUserPermissionsErrorsInternal() /var/www/wiki/mediawiki/core/includes/Title.php:1820 23.5140 178309936 16. Title->checkPermissionHooks() /var/www/wiki/mediawiki/core/includes/Title.php:2338 23.5142 178310696 17. wfRunHooks() /var/www/wiki/mediawiki/core/includes/Title.php:1946 23.5142 178310696 18. Hooks::run() /var/www/wiki/mediawiki/core/includes/GlobalFunctions.php:4032 23.5167 178312136 19. call_user_func_array() /var/www/wiki/mediawiki/core/includes/Hooks.php:199 23.5167 178312848 20. PageTranslationHooks::lockedPagesCheck() /var/www/wiki/mediawiki/core/includes/Hooks.php:199 23.5168 178312984 21. SqlBagOStuff->get() /var/www/wiki/mediawiki/extensions/Translate/tag/PageTranslationHooks.php:777 23.5168 178313336 22. SqlBagOStuff->getMulti() /var/www/wiki/mediawiki/core/includes/objectcache/SqlBagOStuff.php:200
The above might be from xdebug..
Grabbing stack traces for warnings should be possible with a custom error handler and debug_backtrace() or ErrorException. It should probably be put behind a feature flag of some sort so that deployments that don't care about tracking warnings don't incur the performance penalty of generating the backtrace.
