From: Operating system: Linux/Windows PHP version: Irrelevant Package: Network related Bug Type: Bug Bug description:PHP does not notice user abort
Description: ------------ Referencing http://php.net/manual/en/features.connection-handling.php I understand that providing PHP is writing to or reading from the web server connection, a registered shutdown function should be called should the client abort. I have never known this to be the case. I attach a simple script. It attempts to sleep then write back to the client. It has a registered shutdown function that checks connection_status() and connection_aborted(). According to my syslog however, the full script executes followed by the shutdown function which says the user is still connected, despite my pressing the browser stop button immediately after placing the request. I have tested this on Windows using Lighttpd with PHP 5.2, and on Ubuntu with Apache preforking PHP 5.3. Both exhibit the same behaviour. These tests were conducted with ignore_user_abort(true) and (false) - no difference observed so I removed it. Test script: --------------- <?php syslog(LOG_DEBUG, 'Connection opened'); register_shutdown_function('shutdown'); $usleep = 2000000; for ($i=0; $i < 100; $i++) { $str[$i] = ''; for ($x=0; $x < 1000; $x++) { $str[$i] .= 'flubber'; } } if (isset($_REQUEST['usleep'])) { $usleep = (int) $_REQUEST['usleep']; } usleep($usleep); syslog(LOG_DEBUG, 'Completed usleep()'); echo "Thanks for waiting\n"; print_r($str); ob_end_flush(); syslog(LOG_DEBUG, 'ob_end_flush() called'); flush(); syslog(LOG_DEBUG, 'Have flushed()'); // We get to this part regardless of having already pressed STOP function shutdown() { echo "Thanks for waiting\n"; flush(); syslog(LOG_DEBUG, 'Echo completed'); // sleep(1); syslog(LOG_DEBUG, 'Have slept'); syslog(LOG_DEBUG, 'Shutdown detected.'); syslog(LOG_DEBUG, "The result of connection_status() is: " . connection_status()); // The above is almost always 0 if (connection_aborted()) { // This almost never happens! syslog(LOG_DEBUG, 'The connection has aborted'); } else { // This almost always happens! syslog(LOG_DEBUG, 'The connection remains'); } } Expected result: ---------------- syslog entries should stop when PHP writes to the client socket and notes that the client has sent an abort signal. Then, the shutdown function should show that the connection_status() is no longer 0, and that the connection_aborted() method returns true. Actual result: -------------- syslog entries continue to Have flushed(), then show that "The result of connection_status() is: 0." and "The connection remains." This should not be the case. Perhaps Apache is not sending the appropriate signal, yet neither is Lighttpd..? -- Edit bug report at http://bugs.php.net/bug.php?id=54062&edit=1 -- Try a snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=54062&r=trysnapshot52 Try a snapshot (PHP 5.3): http://bugs.php.net/fix.php?id=54062&r=trysnapshot53 Try a snapshot (trunk): http://bugs.php.net/fix.php?id=54062&r=trysnapshottrunk Fixed in SVN: http://bugs.php.net/fix.php?id=54062&r=fixed Fixed in SVN and need be documented: http://bugs.php.net/fix.php?id=54062&r=needdocs Fixed in release: http://bugs.php.net/fix.php?id=54062&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=54062&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=54062&r=needscript Try newer version: http://bugs.php.net/fix.php?id=54062&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=54062&r=support Expected behavior: http://bugs.php.net/fix.php?id=54062&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=54062&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=54062&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=54062&r=globals PHP 4 support discontinued: http://bugs.php.net/fix.php?id=54062&r=php4 Daylight Savings: http://bugs.php.net/fix.php?id=54062&r=dst IIS Stability: http://bugs.php.net/fix.php?id=54062&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=54062&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=54062&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=54062&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=54062&r=mysqlcfg
