#31022 [NEW]: Using '_' in a hostname causes sessions to break

From: spam at taylorw dot com Operating system: Gentoo Linux PHP version: 4.3.9 PHP Bug Type: *Configuration Issues Bug description: Using '_' in a hostname causes sessions to break Description: ------------ Previously I submitted a bug report about sessions not working, in the sense that every session_start() call created a new session, and a new file in /tmp. I have concluded that the host name "spare_ribs" was the issue. By changing the hostname to "spareribs" (no '_') the session issue is fixed. I am not sure if using '_' in a hostname is against some RFC and thus this is not really a bug, but I think that since bind accepted it, and the two browsers I tried with it worked fine, this is not breaking protocol and should work fine. (Apache 2.0.52 being used here.) Reproduce code: --------------- Set hostname to anything with _ such as "spare_ribs". Then reboot box and browse to page one which includes the following code. /* Page 1 */ <?php session_start(); $_SESSION['test'] = 'this is a test.'; echo $_SESSION['test']; echo '<a href="page2.php">click here for page 2</a>'; ?> /* Page 2 */ <?php session_start(); echo 'You should see this is a test:'; echo $_SESSION['test']; echo '<a href="page1.php">click here for page 1</a>'; ?> Expected result: ---------------- Page one should say 'this is a test', and page two should say 'You should see this is a test: this is a test'. Actual result: -------------- However page two only says 'You should see this is a test'. And a new session id has been assigned, as well as a new session created in /tmp. -- Edit bug report at http://bugs.php.net/?id=31022&edit=1 -- Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=31022&r=trysnapshot4 Try a CVS snapshot (php5.0): http://bugs.php.net/fix.php?id=31022&r=trysnapshot50 Try a CVS snapshot (php5.1): http://bugs.php.net/fix.php?id=31022&r=trysnapshot51 Fixed in CVS: http://bugs.php.net/fix.php?id=31022&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=31022&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=31022&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=31022&r=needscript Try newer version: http://bugs.php.net/fix.php?id=31022&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=31022&r=support Expected behavior: http://bugs.php.net/fix.php?id=31022&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=31022&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=31022&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=31022&r=globals PHP 3 support discontinued: http://bugs.php.net/fix.php?id=31022&r=php3 Daylight Savings: http://bugs.php.net/fix.php?id=31022&r=dst IIS Stability: http://bugs.php.net/fix.php?id=31022&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=31022&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=31022&r=float MySQL Configuration Error: http://bugs.php.net/fix.php?id=31022&r=mysqlcfg