* @brief Class for storing data for a short time
*/
-use \Friendica\Core\Config;
-use \Friendica\Core\PConfig;
+use Friendica\Core\Config;
+use Friendica\Core\PConfig;
class Cache {
/**
*
* @return integer The cache duration in seconds
*/
- private function duration($level) {
+ private static function duration($level) {
switch($level) {
case CACHE_MONTH;
$seconds = 2592000;
$memcache = self::memcache();
if (is_object($memcache)) {
// We fetch with the hostname as key to avoid problems with other applications
- $value = $memcache->get(get_app()->get_hostname().":".$key);
- if (!is_bool($value)) {
- return unserialize($value);
+ $cached = $memcache->get(get_app()->get_hostname().":".$key);
+ $value = @unserialize($cached);
+
+ // Only return a value if the serialized value is valid.
+ // We also check if the db entry is a serialized
+ // boolean 'false' value (which we want to return).
+ if ($cached === serialize(false) || $value !== false) {
+ return $value;
}
return null;
dbesc($key)
);
- if (count($r)) {
- return $r[0]['v'];
+ if (dbm::is_result($r)) {
+ $cached = $r[0]['v'];
+ $value = @unserialize($cached);
+
+ // Only return a value if the serialized value is valid.
+ // We also check if the db entry is a serialized
+ // boolean 'false' value (which we want to return).
+ if ($cached === serialize(false) || $value !== false) {
+ return $value;
+ }
}
return null;
/**
* @brief Put data in the cache according to the key
*
+ * The input $value can have multiple formats.
+ *
* @param string $key The key to the cached data
* @param mixed $valie The value that is about to be stored
* @param integer $duration The cache lifespan
/// @todo store the cache data in the same way like the config data
q("REPLACE INTO `cache` (`k`,`v`,`expire_mode`,`updated`) VALUES ('%s','%s',%d,'%s')",
dbesc($key),
- dbesc($value),
+ dbesc(serialize($value)),
intval($duration),
dbesc(datetime_convert()));
}
set_config("system", "cache_cleared_day", time());
}
- if (($max_level <= CACHE_HOUR) AND (get_config("system", "cache_cleared_hour")) < time() - self::duration(CACHE_HOUR)) {
+ if (($max_level <= CACHE_HOUR) && (get_config("system", "cache_cleared_hour")) < time() - self::duration(CACHE_HOUR)) {
q("DELETE FROM `cache` WHERE `updated` < '%s' AND `expire_mode` = %d",
dbesc(datetime_convert('UTC','UTC',"now - 1 hours")), intval(CACHE_HOUR));
set_config("system", "cache_cleared_hour", time());
}
- if (($max_level <= CACHE_HALF_HOUR) AND (get_config("system", "cache_cleared_half_hour")) < time() - self::duration(CACHE_HALF_HOUR)) {
+ if (($max_level <= CACHE_HALF_HOUR) && (get_config("system", "cache_cleared_half_hour")) < time() - self::duration(CACHE_HALF_HOUR)) {
q("DELETE FROM `cache` WHERE `updated` < '%s' AND `expire_mode` = %d",
dbesc(datetime_convert('UTC','UTC',"now - 30 minutes")), intval(CACHE_HALF_HOUR));
set_config("system", "cache_cleared_half_hour", time());
}
- if (($max_level <= CACHE_QUARTER_HOUR) AND (get_config("system", "cache_cleared_hour")) < time() - self::duration(CACHE_QUARTER_HOUR)) {
+ if (($max_level <= CACHE_QUARTER_HOUR) && (get_config("system", "cache_cleared_quarter_hour")) < time() - self::duration(CACHE_QUARTER_HOUR)) {
q("DELETE FROM `cache` WHERE `updated` < '%s' AND `expire_mode` = %d",
dbesc(datetime_convert('UTC','UTC',"now - 15 minutes")), intval(CACHE_QUARTER_HOUR));
set_config("system", "cache_cleared_quarter_hour", time());
}
- if (($max_level <= CACHE_FIVE_MINUTES) AND (get_config("system", "cache_cleared_five_minute")) < time() - self::duration(CACHE_FIVE_MINUTES)) {
+ if (($max_level <= CACHE_FIVE_MINUTES) && (get_config("system", "cache_cleared_five_minute")) < time() - self::duration(CACHE_FIVE_MINUTES)) {
q("DELETE FROM `cache` WHERE `updated` < '%s' AND `expire_mode` = %d",
dbesc(datetime_convert('UTC','UTC',"now - 5 minutes")), intval(CACHE_FIVE_MINUTES));
set_config("system", "cache_cleared_five_minute", time());
}
- if (($max_level <= CACHE_MINUTE) AND (get_config("system", "cache_cleared_minute")) < time() - self::duration(CACHE_MINUTE)) {
+ if (($max_level <= CACHE_MINUTE) && (get_config("system", "cache_cleared_minute")) < time() - self::duration(CACHE_MINUTE)) {
q("DELETE FROM `cache` WHERE `updated` < '%s' AND `expire_mode` = %d",
dbesc(datetime_convert('UTC','UTC',"now - 1 minutes")), intval(CACHE_MINUTE));