qa-app-cookies.php 2.4 KB
Newer Older
Gideon Greenspan committed
1 2 3
<?php

/*
Gideon Greenspan committed
4
	Question2Answer by Gideon Greenspan and contributors
Gideon Greenspan committed
5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37

	http://www.question2answer.org/

	
	File: qa-include/qa-app-cookies.php
	Version: See define()s at top of qa-include/qa-base.php
	Description: User cookie management (application level) for tracking anonymous posts


	This program is free software; you can redistribute it and/or
	modify it under the terms of the GNU General Public License
	as published by the Free Software Foundation; either version 2
	of the License, or (at your option) any later version.
	
	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
	GNU General Public License for more details.

	More about this license: http://www.question2answer.org/license.php
*/

	if (!defined('QA_VERSION')) { // don't allow this page to be requested directly from browser
		header('Location: ../');
		exit;
	}


	function qa_cookie_get()
/*
	Return the user identification cookie sent by the browser for this page request, or null if none
*/
	{
Gideon Greenspan committed
38
		if (qa_to_override(__FUNCTION__)) { $args=func_get_args(); return qa_call_override(__FUNCTION__, $args); }
Gideon Greenspan committed
39 40 41 42 43 44 45 46 47 48 49
		
		return isset($_COOKIE['qa_id']) ? qa_gpc_to_string($_COOKIE['qa_id']) : null;
	}

	
	function qa_cookie_get_create()
/*
	Return user identification cookie sent by browser if valid, or create a new one if not.
	Either way, extend for another year (this is used when an anonymous post is created)
*/
	{
Gideon Greenspan committed
50
		if (qa_to_override(__FUNCTION__)) { $args=func_get_args(); return qa_call_override(__FUNCTION__, $args); }
Gideon Greenspan committed
51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82
		
		require_once QA_INCLUDE_DIR.'qa-db-cookies.php';

		$cookieid=qa_cookie_get();
		
		if (isset($cookieid) && qa_db_cookie_exists($cookieid))
			; // cookie is valid
		else
			$cookieid=qa_db_cookie_create(qa_remote_ip_address());
		
		setcookie('qa_id', $cookieid, time()+86400*365, '/', QA_COOKIE_DOMAIN);
		$_COOKIE['qa_id']=$cookieid;
		
		return $cookieid;
	}

	
	function qa_cookie_report_action($cookieid, $action)
/*
	Called after a database write $action performed by a user identified by $cookieid,
	relating to $questionid, $answerid and/or $commentid
*/
	{
		require_once QA_INCLUDE_DIR.'qa-db-cookies.php';
		
		qa_db_cookie_written($cookieid, qa_remote_ip_address());
	}


/*
	Omit PHP closing tag to help avoid accidental output
*/