Bug #46353 [NoF->Fbk]: string concatenation leaks memory when using execute

Edit report at http://bugs.php.net/bug.php?id=46353&edit=1 ID: 46353 Updated by: felipe@php.net Reported by: anders at freeones dot com Summary: string concatenation leaks memory when using execute -Status: No Feedback +Status: Feedback Type: Bug Package: Scripting Engine problem Operating System: Linux 2.6.20-1.2320 PHP Version: 5.2.6 Block user comment: N New Comment: Please try using this snapshot: http://snaps.php.net/php5.3-latest.tar.gz For Windows: http://windows.php.net/snapshots/ Previous Comments: ------------------------------------------------------------------------ [2010-08-18 12:31:07] andrey@php.net not a mysql thing, still no feedback ------------------------------------------------------------------------ [2008-11-03 01:00:04] php-bugs at lists dot php dot net No feedback was provided for this bug for over a week, so it is being suspended automatically. If you are able to provide the information that was originally requested, please do so and change the status of the bug back to "Open". ------------------------------------------------------------------------ [2008-10-26 11:12:34] jani@php.net Thank you for this bug report. To properly diagnose the problem, we need a short but complete example script to be able to reproduce this bug ourselves. A proper reproducing script starts with <?php and ends with ?>, is max. 10-20 lines long and does not require any external resources such as databases, etc. If the script requires a database to demonstrate the issue, please make sure it creates all necessary tables, stored procedures etc. Please avoid embedding huge scripts into the report. ------------------------------------------------------------------------ [2008-10-21 08:15:21] anders at freeones dot com Description: ------------ I run some code 5 million itteration yesterday, today I change my string building to use single quotes and the dot operator. That version was able to do aprox 25k itterations then the script died due memory leak. Reproduce code: --------------- # Makign a string like this leaks NOT memory # $lInsert = "Insert into {$this->mTable} (datetime,entity_id,entity_type,domain,country,location,raws,uniques)" . # " values ('{$this->getDateTime()}',{$this->getEntityId()},{$this->getEntityType()},{$this->getDomain()}," . # "{$this->getCountry()},{$this->getLocation()},{$this->getRaws()},{$this->getUniques()});"; # Making a string liek this leaks memory when doign execute $lInsert = 'Insert into '.$this->mTable.' (datetime,entity_id,entity_type,domain,country,location,raws,uniques)' . ' values ("'.$this->getDateTime().'",'.$this->getEntityId().','.$this->getEntityType().','.$this->getDomain().',' .$this->getCountry().','.$this->getLocation().','.$this->getRaws().','.$this->getUniques().');'; # $lInsert = "Insert into {$this->mTable} (datetime,entity_id,entity_type,domain,country,location,raws,uniques)" . # " values ('{$lTimeStamp}',{$lEntityId},{$lEntityType},{$lDomain},{$lCountry},{$lLocation},{$lRaws},{$lUniques})"; # print memory_get_usage()."\n"; $lStatement =& $this->mDbh->prepare($lInsert); if (MDB2::isError($lStatement)){ error_log($lStatement->getMessage().';query:'.$lInsert.' '.$lStatement->userinfo); $lResult = false; } else { $lResult =& $lStatement->execute(); $lStatement->free(); } Expected result: ---------------- See code comments Actual result: -------------- see code comments ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/bug.php?id=46353&edit=1