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Bug #17598 no way to detect a session without creating a session
Submitted: 2002-06-04 12:40 UTC Modified: 2002-08-11 01:45 UTC
Votes:1
Avg. Score:5.0 ± 0.0
Reproduced:1 of 1 (100.0%)
Same Version:1 (100.0%)
Same OS:0 (0.0%)
From: adam at adeptsoftware dot com Assigned:
Status: Not a bug Package: Session related
PHP Version: 4.2.1 OS: WinXP
Private report: No CVE-ID: None
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 [2002-06-04 12:40 UTC] adam at adeptsoftware dot com 
There is no way to detect if a session exists, without creating a session.  This can trigger warnings like this in cookie detectors:

This page wishes to set the cookie
   PHPSESSID="bd977b12c9da97f1ba0b07e4fe25a176"

A page needs to generate differently based on whether a user is "logged in" (a session exists) or just a "visitor".

You shouldn't have to create a session to know if it exists.  I suppose you could manually check cookies & the URL etc but shouldn't there be a function for this?

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 [2002-06-05 09:00 UTC] postings dot dynweb at hans-spath dot de 
// just a untested quick-hack
// if it doesn't work, I hope you get the idea

function session_exists( $name=NULL )
{
   if( $name === NULL )
      $name = ini_get('session.name');

   if( ini_get(session.use_cookies) == 1 )
      return isset($_COOKIE[$name]);
   else
      return isset($_GET[$name]);
}
 [2002-08-11 01:45 UTC] kalowsky@php.net 
Sure there is, look at the nice patch provided by hans-spath.de!  Marking as bogus, as this isn't a bug.
 
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