Bug #68859 [NEW]: ob_clean does not clean the buffer.

From:	exsystemchina at gmail dot com	Date:	Tue, 20 Jan 2015 04:34:23 +0000
Subject:	Bug #68859 [NEW]: ob_clean does not clean the buffer.
Groups:	php.bugs
Request:	Send a blank email to php-bugs+get-190067@lists.php.net to get a copy of this message

From: exsystemchina at gmail dot com Operating system: Irrelevant PHP version: 5.6.4 Package: Output Control Bug Type: Bug Bug description:ob_clean does not clean the buffer. Description: ------------ put the 2 test scripts inside the same apache server host directory, and run test.php to see the result. when not setting [out_buffering] with [Off] in php.ini, ob_clean() does not clear the output. But if replace the code marked (*) with those marked (**), everything is okay, Just [HELLO] is output. when setting [out_buffering] with Off, everything is okay. when using php cli, everything is okay. The situation is also found in PHP5.5.9 with apache. Test script: --------------- ====test.php==== <?php //tested under php5.5.9 with apache2.4.7-x64-windows (XAMPP1.8.3) //tested under php5.6.4 with apache2.4.10-x64-kylin-ubuntu-14.04 register_shutdown_function(function() { while (ob_get_level()>1) { ob_end_clean(); } ob_clean(); //........(*) // ob_end_clean(); //......(**) // ob_start(); //......(**) echo ''; echo 'HELLO'; }); ob_start(); while (ob_get_level()>1) { ob_end_clean(); } ob_clean(); //.......(*) //ob_end_clean(); //........(**) //ob_start(); //.......(**) echo ''; require_once 't.php'; ====t.php==== <html> <body>  <?php throw new Exception(); ?> </body> </html> Expected result: ---------------- HELLO Actual result: -------------- <html> <body>  HELLO -- Edit bug report at https://bugs.php.net/bug.php?id=68859&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=68859&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=68859&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=68859&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=68859&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=68859&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=68859&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=68859&r=needscript Try newer version: https://bugs.php.net/fix.php?id=68859&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=68859&r=support Expected behavior: https://bugs.php.net/fix.php?id=68859&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=68859&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=68859&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=68859&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=68859&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=68859&r=dst IIS Stability: https://bugs.php.net/fix.php?id=68859&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=68859&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=68859&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=68859&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=68859&r=mysqlcfg