Bug #73936 [NEW]: Certain special header() calls wrongly prevent connection from closing

From: markamery at btinternet dot com Operating system: Ubuntu PHP version: Irrelevant Package: Apache2 related Bug Type: Bug Bug description:Certain special header() calls wrongly prevent connection from closing Description: ------------ Running under mod_php, calling header('HTTP/1.1 200 OK'); seems to prevent the connection from being closed once the PHP script finishes. This can be demonstrated by, for instance, hitting the script with ab (the Apache benchmark tool), which (unlike most HTTP clients, including browsers) only considers a request to have finished once the connection is closed, rather than when Content-Length bytes have been received. http://stackoverflow.com/q/34367115/1709587 describes this case in more detail. Bizarrely, header('http/1.1 200 OK'); does not have the same effect, despite producing a character-for-character identical HTTP response (as can be observed with curl -i --raw). Test script: --------------- <?php header('HTTP/1.1 200 OK'); Expected result: ---------------- Unless Connection: keep-alive is specified in the request, the connection should close once the PHP script finishes. In particular, the behaviour should be identical to other calls with the same meaning, like <?php http_response_code(200); or <?php header('http/1.1 200 OK') Actual result: -------------- The connection does not close, and the alternate scripts suggested above have different behaviours to the test script. -- Edit bug report at https://bugs.php.net/bug.php?id=73936&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=73936&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=73936&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=73936&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=73936&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=73936&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=73936&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=73936&r=needscript Try newer version: https://bugs.php.net/fix.php?id=73936&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=73936&r=support Expected behavior: https://bugs.php.net/fix.php?id=73936&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=73936&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=73936&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=73936&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=73936&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=73936&r=dst IIS Stability: https://bugs.php.net/fix.php?id=73936&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=73936&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=73936&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=73936&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=73936&r=mysqlcfg