Bug #16673 Updated: callback registered via ob_start is called when not expected

ID: 16673 Updated by: bob@mroczka.com Reported By: bob@mroczka.com -Status: Feedback +Status: Open Bug Type: Output Control Operating System: linux 2.4.18 PHP Version: 4.2.0 New Comment: with the ob_end_clean call in my code my intention is to discard the buffer and disable output buffering. i do not have any ob_flush calls in my code. here is some background on what i'm trying to do. in a nutshell i have a call in my code (dio_fcntl) which attempts to get an exclusive lock on a file. in theory this call can block forever (or until the script execution timeout occurs). to alert the user that a timeout occurred while waiting on the lock i create a buffer with an error message just before the call to the code that may block. if the script gets the lock before a timeout occurs i call ob_end_clean() to release the error message in the buffer which is not needed. if a timeout occurs php flushes this buffer containing the error message and the user is notified of the error. the purpose of registering a callback in my case is not to modify the output buffer (the error message) but to put a message in the web server error log that this problem occurred. i was expecting the callback function to not get called when ob_end_clean() is executed. in theory the callback should only be called in my case if the script execution timer expires. some code which can block Previous Comments: ------------------------------------------------------------------------ [2002-05-03 23:13:30] yohgaki@php.net I guess you have some ob_flush() functions, don't you? ------------------------------------------------------------------------ [2002-04-17 18:58:31] bob@mroczka.com i have the following code where ... represents some echo statements but does not include any ob_xxx calls. ob_start("func"); ... ob_end_clean(); and func is defined as: function func ($buf) { error_log("got here",0); return $buf; } when this code runs i get "got here" in my error log. i am expecting the ob_end_clean call to turn off output buffering which includes not calling the callback I registered. i am using 4.2.0rc2 currently. ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=16673&edit=1