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Top Forums Shell Programming and Scripting Multiple PHP sessions within the same browser instance Post 54360 by zazzybob on Wednesday 11th of August 2004 10:30:36 AM
Old 08-11-2004
Multiple PHP sessions within the same browser instance

Dear all.....

I am currently writing a Help-Desk / Knowledge Base application using PHP/PostGreSQL.

I authenticate the user using a quite elaborate mechanism of cookies. The problem is that using cookies (I also have a version using sessions with the same problem), I can only seem to get one user logged in from any one browser instance. (Why would I want to be logging in as two users from one browser/IP? In case I want to open another browser tab, log in as "root" or whoever, and do some administration without logging out of my other session.)

For example, say I fire up Firefox, and log into my application. A session is started for the browser. I open another tab, and login as a different user, the session (and any session variables) are "overwritten" by this new session.

I have made a workaround for the time being, by writing IP addresses and usernames to a table, and only allowing one login from any one IP address. The problem here is that if the user forgets to logout, then session_destroy() (or manual cookie cleanup, depending on the version of my application) is never called, and when I roll this out the user will be calling the DBA/SA (me!) and I'd have to DELETE FROM ip_addr WHERE username = 'blah' AND ip_addr = 'xxx.xxx.xxx.xxx' to get rid of the entry and remove the lock - something I don't want to be doing for 150 users!!!!

In short, does anyone know a way to allow multiple independant sessions with independant session IDs from the *same* browser instance?

Any help would be greatly appreciated. If not, I can still stick to my one-login-per-IP method, as all our clients use different IP addresses and the proxy is bypassed on the local network.
 

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GET_BROWSER(3)								 1							    GET_BROWSER(3)

get_browser - Tells what the user's browser is capable of

SYNOPSIS
mixed get_browser ([string $user_agent], [bool $return_array = false]) DESCRIPTION
Attempts to determine the capabilities of the user's browser, by looking up the browser's information in the browscap.ini file. PARAMETERS
o $user_agent - The User Agent to be analyzed. By default, the value of HTTP User-Agent header is used; however, you can alter this (i.e., look up another browser's info) by passing this parameter. You can bypass this parameter with a NULL value. o $return_array - If set to TRUE, this function will return an array instead of an object. RETURN VALUES
The information is returned in an object or an array which will contain various data elements representing, for instance, the browser's major and minor version numbers and ID string; TRUE/ FALSE values for features such as frames, JavaScript, and cookies; and so forth. The cookies value simply means that the browser itself is capable of accepting cookies and does not mean the user has enabled the browser to accept cookies or not. The only way to test if cookies are accepted is to set one with setcookie(3), reload, and check for the value. CHANGELOG
+--------+--------------------------------------------------+ |Version | | | | | | | Description | | | | +--------+--------------------------------------------------+ | 4.3.2 | | | | | | | The optional parameter $return_array was added. | | | | +--------+--------------------------------------------------+ EXAMPLES
Example #1 Listing all information about the users browser <?php echo $_SERVER['HTTP_USER_AGENT'] . " "; $browser = get_browser(null, true); print_r($browser); ?> The above example will output something similar to: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7) Gecko/20040803 Firefox/0.9.3 Array ( [browser_name_regex] => ^mozilla/5.0 (windows; .; windows nt 5.1; .*rv:.*) gecko/.* firefox/0.9.*$ [browser_name_pattern] => Mozilla/5.0 (Windows; ?; Windows NT 5.1; *rv:*) Gecko/* Firefox/0.9* [parent] => Firefox 0.9 [platform] => WinXP [browser] => Firefox [version] => 0.9 [majorver] => 0 [minorver] => 9 [cssversion] => 2 [frames] => 1 [iframes] => 1 [tables] => 1 [cookies] => 1 [backgroundsounds] => [vbscript] => [javascript] => 1 [javaapplets] => 1 [activexcontrols] => [cdf] => [aol] => [beta] => 1 [win16] => [crawler] => [stripper] => [wap] => [netclr] => ) NOTES
Note In order for this to work, your browscap configuration setting in php.ini must point to the correct location of the browscap.ini file on your system. browscap.ini is not bundled with PHP, but you may find an up-to-date php_browscap.ini file here. While browscap.ini contains information on many browsers, it relies on user updates to keep the database current. The format of the file is fairly self-explanatory. PHP Documentation Group GET_BROWSER(3)
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