#34864 [NEW]: HEAD request causes more than one output buffer not to pass on it's contents

From: famtj at yahoo dot com Operating system: Unix PHP version: 4.4.0 PHP Bug Type: Output Control Bug description: HEAD request causes more than one output buffer not to pass on it's contents Description: ------------ When more than one output buffers are chained together, and the client requests the page via HEAD, the inner-most output buffer won't pass on the buffer contents to the next buffer after modifying its code. It seems to send a null string. It works fine with a PUT request. Reproduce code: --------------- <?php function contentLength($html) { header('Content-Length: ' . strlen($html)); return ($html); } ob_start("contentLength"); function fix_code($buffer) { return(str_replace(" />", ">", $buffer)); } ob_start("fix_code"); ?> <html><head> <title>Bug</title> </head><body> <p>there is a bug</p> </body></html> Expected result: ---------------- HTTP/1.1 200 OK Date: Fri, 14 Oct 2005 01:30:04 GMT Server: Apache/1.3.33 (Unix) PHP/4.4.0 mod_ssl/2.8.24 OpenSSL/0.9.7a mod_perl/1.29 FrontPage/5.0.2.2635 X-Powered-By: PHP/4.4.0 Content-Length: 82 Connection: close Content-Type: text/html Actual result: -------------- HTTP/1.1 200 OK Date: Fri, 14 Oct 2005 01:29:20 GMT Server: Apache/1.3.33 (Unix) PHP/4.4.0 mod_ssl/2.8.24 OpenSSL/0.9.7a mod_perl/1.29 FrontPage/5.0.2.2635 X-Powered-By: PHP/4.4.0 Content-Length: 0 Connection: close Content-Type: text/html -- Edit bug report at http://bugs.php.net/?id=34864&edit=1 -- Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=34864&r=trysnapshot4 Try a CVS snapshot (php5.0): http://bugs.php.net/fix.php?id=34864&r=trysnapshot50 Try a CVS snapshot (php5.1): http://bugs.php.net/fix.php?id=34864&r=trysnapshot51 Fixed in CVS: http://bugs.php.net/fix.php?id=34864&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=34864&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=34864&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=34864&r=needscript Try newer version: http://bugs.php.net/fix.php?id=34864&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=34864&r=support Expected behavior: http://bugs.php.net/fix.php?id=34864&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=34864&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=34864&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=34864&r=globals PHP 3 support discontinued: http://bugs.php.net/fix.php?id=34864&r=php3 Daylight Savings: http://bugs.php.net/fix.php?id=34864&r=dst IIS Stability: http://bugs.php.net/fix.php?id=34864&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=34864&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=34864&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=34864&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=34864&r=mysqlcfg