note 42290 added to function.ob-clean

Although it is mentioned in the manual, you have to be careful when using output buffering in big cycles (such as mass mail sending scripts), because ob_clean() actually does not free any memory, and with each iteration the amount of memory allocated from your script will increase significantly. Instead of calling ob_clean() at the end of the cycle, you have to either use ob_get_clean(), which is a combination of ob_get_contents() and ob_end_clean(), or just ob_end_clean() to free the memory. Try the following test to see the difference: <?php for ($i=0; $i<10; $i++) { ob_start(); echo "This is iteration $i: "; // * Don't do this! // $buf = ob_get_contents(); // ob_clean(); // * Use this instead: $buf = ob_get_clean(); echo $buf; echo memory_get_usage()."\n"; } ?> ---- Manual Page -- http://www.php.net/manual/en/function.ob-clean.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+42290 Delete -- http://master.php.net/manage/user-notes.php?action=delete+42290&report=yes Reject -- http://master.php.net/manage/user-notes.php?action=reject+42290&report=yes Search -- http://master.php.net/manage/user-notes.php