Bug #13687: Session variable not set when redirecting using full URL

From: abc@dk2net.dk Operating system: Win 98 and NT PHP version: 4.0.6 PHP Bug Type: Session related Bug description: Session variable not set when redirecting using full URL login.php checks for validity of $HTTP_POST_VARS['user'] && $HTTP_POST_VARS['pass'] and if the combination is OK sets variable $LoginSuccess which is then registered using: session_register(LoginSuccess); Conntrol is then transferred to next.php using the following code: header("Location: http://$db_host/next.php"); The value of $db_host at this stage is "localhost". When next.php starts executing it checks whether LoginSuccess is set like this: session_start(); if(empty($LoginSuccess)) ...... # Force new login The problem is that the very first time the sequence above is executed, LoginSuccess evaluates to empty even though is has been set. After a second login attemt, it usually evaluates to Set. The problem may or may not be identical to Bug ID# 6121. I found that the code works correctly if I use relative URL instead: header("Location: http:next.php"); But really, that should'nt make a difference, should it? I am using default configuration for session mgmt., everything is executed locally on my PC. -- Edit bug report at: http://bugs.php.net/?id=13687&edit=1