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112 lines
3.6 KiB
PHP
112 lines
3.6 KiB
PHP
<?php
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/*
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+-----------------------------------------------------------------------+
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| program/include/cache.inc |
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| This file is part of the RoundCube Webmail client |
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| Copyright (C) 2005, RoundCube Dev, - Switzerland |
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| Licensed under the GNU GPL |
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| PURPOSE: |
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| Provide access to the application cache |
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+-----------------------------------------------------------------------+
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| Author: Thomas Bruederli <roundcube@gmail.com> |
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+-----------------------------------------------------------------------+
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$Id$
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*/
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function rcube_read_cache($key)
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{
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global $DB, $CACHE_KEYS;
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// query db
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$sql_result = $DB->query(sprintf("SELECT cache_id, data
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FROM %s
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WHERE user_id=%d
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AND cache_key='%s'",
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get_table_name('cache'),
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$_SESSION['user_id'],
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$key));
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// get cached data
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if ($sql_arr = $DB->fetch_assoc($sql_result))
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{
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$data = $sql_arr['data'];
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$CACHE_KEYS[$key] = $sql_arr['cache_id'];
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}
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else
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$data = FALSE;
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return $data;
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}
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function rcube_write_cache($key, $data, $session_cache=FALSE)
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{
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global $DB, $CACHE_KEYS, $sess_id;
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// check if we already have a cache entry for this key
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if (!isset($CACHE_KEYS[$key]))
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{
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$sql_result = $DB->query(sprintf("SELECT cache_id
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FROM %s
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WHERE user_id=%d
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AND cache_key='%s'",
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get_table_name('cache'),
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$_SESSION['user_id'],
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$key));
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if ($sql_arr = $DB->fetch_assoc($sql_result))
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$CACHE_KEYS[$key] = $sql_arr['cache_id'];
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else
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$CACHE_KEYS[$key] = FALSE;
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}
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// update existing cache record
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if ($CACHE_KEYS[$key])
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{
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$DB->query(sprintf("UPDATE %s
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SET created=NOW(),
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data='%s'
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WHERE user_id=%d
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AND cache_key='%s'",
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get_table_name('cache'),
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addslashes($data),
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$_SESSION['user_id'],
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$key));
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}
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// add new cache record
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else
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{
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$DB->query(sprintf("INSERT INTO %s
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(created, user_id, session_id, cache_key, data)
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VALUES (NOW(), %d, %s, '%s', '%s')",
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get_table_name('cache'),
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$_SESSION['user_id'],
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$session_cache ? "'$sess_id'" : 'NULL',
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$key,
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addslashes($data)));
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}
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}
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function rcube_clear_cache($key)
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{
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global $DB;
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$DB->query(sprintf("DELETE FROM %s
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WHERE user_id=%d
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AND cache_key='%s'",
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get_table_name('cache'),
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$_SESSION['user_id'],
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$key));
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}
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?>
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