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07ec659385
This project lived only on the server without version control. This is now the starting point for the repository.
77 lines
2.2 KiB
PHP
77 lines
2.2 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-level access to cache table
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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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require_once QA_INCLUDE_DIR . 'db/maxima.php';
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/**
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* Create (or replace) the item ($type, $cacheid) in the database cache table with $content
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* @param $type
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* @param $cacheid
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* @param $content
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* @return mixed
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*/
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function qa_db_cache_set($type, $cacheid, $content)
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{
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if (qa_to_override(__FUNCTION__)) { $args=func_get_args(); return qa_call_override(__FUNCTION__, $args); }
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qa_db_query_sub(
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'DELETE FROM ^cache WHERE lastread<NOW()-INTERVAL # SECOND',
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QA_DB_MAX_CACHE_AGE
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);
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qa_db_query_sub(
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'INSERT INTO ^cache (type, cacheid, content, created, lastread) VALUES ($, $, $, NOW(), NOW()) ' .
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'ON DUPLICATE KEY UPDATE content = VALUES(content), created = VALUES(created), lastread = VALUES(lastread)',
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$type, $cacheid, $content
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);
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}
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/**
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* Retrieve the item ($type, $cacheid) from the database cache table
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* @param $type
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* @param $cacheid
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* @return mixed|null
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*/
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function qa_db_cache_get($type, $cacheid)
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{
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if (qa_to_override(__FUNCTION__)) { $args=func_get_args(); return qa_call_override(__FUNCTION__, $args); }
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$content = qa_db_read_one_value(qa_db_query_sub(
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'SELECT content FROM ^cache WHERE type=$ AND cacheid=#',
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$type, $cacheid
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), true);
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if (isset($content))
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qa_db_query_sub(
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'UPDATE ^cache SET lastread=NOW() WHERE type=$ AND cacheid=#',
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$type, $cacheid
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);
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return $content;
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}
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