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07ec659385
This project lived only on the server without version control. This is now the starting point for the repository.
82 lines
2.0 KiB
PHP
82 lines
2.0 KiB
PHP
<?php
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/*
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Question2Answer by Gideon Greenspan and contributors
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http://www.question2answer.org/
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Description: Database access functions for user cookies
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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More about this license: http://www.question2answer.org/license.php
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*/
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if (!defined('QA_VERSION')) { // don't allow this page to be requested directly from browser
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header('Location: ../../');
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exit;
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}
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/**
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* Create a new random cookie for $ipaddress and insert into database, returning it
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* @param $ipaddress
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* @return null|string
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*/
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function qa_db_cookie_create($ipaddress)
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{
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for ($attempt = 0; $attempt < 10; $attempt++) {
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$cookieid = qa_db_random_bigint();
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if (qa_db_cookie_exists($cookieid))
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continue;
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qa_db_query_sub(
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'INSERT INTO ^cookies (cookieid, created, createip) ' .
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'VALUES (#, NOW(), UNHEX($))',
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$cookieid, bin2hex(@inet_pton($ipaddress))
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);
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return $cookieid;
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}
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return null;
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}
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/**
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* Note in database that a write operation has been done by user identified by $cookieid and from $ipaddress
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* @param $cookieid
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* @param $ipaddress
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*/
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function qa_db_cookie_written($cookieid, $ipaddress)
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{
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qa_db_query_sub(
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'UPDATE ^cookies SET written=NOW(), writeip=UNHEX($) WHERE cookieid=#',
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bin2hex(@inet_pton($ipaddress)), $cookieid
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);
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}
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/**
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* Return whether $cookieid exists in database
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* @param $cookieid
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* @return bool
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*/
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function qa_db_cookie_exists($cookieid)
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{
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$cookie = qa_db_read_one_value(qa_db_query_sub(
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'SELECT COUNT(*) FROM ^cookies WHERE cookieid=#',
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$cookieid
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));
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return $cookie > 0;
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}
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