note 40365 deleted from function.setcookie by tularis

Note Submitter: trouby at hotmail dot com ---- I had the following problem, I was creating a stat script. Each user on my site will get an ID based on there browser configuration and their IP address. When the user pops on my website, the first time they will get: <?php // index.php session_start(); if (!isset($_SESSION['user_id'])) { header("Refresh: 1"); print "<script language='javascript' src='tstat.js'></script>"; } else print "welcome"; ?> // tstat.js document.write('<img src="http://www.example.com/make_id.php?var1=bla" />'); <?php // make_id.php session_start(); $_SESSION['user_id'] = trb_makeID(); // my own function which generates an ID (not important) ?> Now let's say my site is www.example.com and when I enter the site for the first time, the javascript will be printed and that javascript will connect to my make_id.php, which will assign the variable 'user_id', now when the brower will refresh, the script will print 'welcome'. This all worked for me, BUT there were user which had trouble entering my site, after spending one whole day researching what could be the problem, I noticed that they entered my site 'example.com' and the javascript will print an image to 'www.example.com' so those visitors had launched two sessions at the same time and that resulted in a constant refresh.. My solution was to set my own session cookies with a correct domain. example.com and www.example.com are to different values for your browser!