ID: 42641 Updated by: [EMAIL PROTECTED] Reported By: robin_fernandes at uk dot ibm dot com -Status: Open +Status: Feedback Bug Type: Output Control Operating System: Windows PHP Version: 5CVS-2007-09-12 (snap) New Comment:
Let's start with the prototype for this function: bool ob_start ( [callback $output_callback [, int $chunk_size [, bool $erase]]] ) The first parameter is "callback" type, so it expects either a string (function name) or array (object, method). More information about "callback" pseudo-type: http://www.php.net/callback I don't know where you got the idea that you can pass multiple callbacks in there. It's not said to work like that anywhere in the manual at least. :) Please fix your example script accordingly (and tune up your display_errors / error_reporting levels..). Previous Comments: ------------------------------------------------------------------------ [2007-09-12 09:15:35] robin_fernandes at uk dot ibm dot com Description: ------------ ob_start() can initialize multiple output buffers in a single call using a comma delimited list of output callbacks, as follows: ob_start('f,f,f'); where function f() is a defined function. However, behaviour when passing an undefined callback is inconsistent: ob_start('non_existent,f'); returns false and initializes no output buffers, whereas ob_start('non_existent,f,f'); returns true and initializes 2 output buffers with f as a callback. Using arrays, the behaviour is consistent. The following both return false and initialize no output buffers: ob_start(array('non_existent', 'f')); ob_start(array('non_existent', 'f', 'f')); Tested on Windows XP on PHP 5.2.5-dev (cli) (built: Sep 12 2007 04:04:36). Reproduce code: --------------- <?php function f($str) { return $str; } function checkAndClean() { print_r(ob_list_handlers()); while (ob_get_level()>0) { ob_end_flush(); } } var_dump(ob_start(array('non_existent', 'f'))); checkAndClean(); var_dump(ob_start(array('non_existent', 'f', 'f'))); checkAndClean(); var_dump(ob_start('non_existent,f')); checkAndClean(); var_dump(ob_start('non_existent,f,f')); //bug: expecting false with no output buffers. Actually returns true and initialises 2 output buffers. checkAndClean(); ?> Expected result: ---------------- bool(false) Array ( ) bool(false) Array ( ) bool(false) Array ( ) bool(false) Array ( ) Actual result: -------------- bool(false) Array ( ) bool(false) Array ( ) bool(false) Array ( ) bool(true) Array ( [0] => f [1] => f ) ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=42641&edit=1
