3 namespace Friendica\Core\Cache;
5 use Friendica\Core\Cache;
6 use Friendica\Database\dba;
7 use Friendica\Database\DBM;
8 use Friendica\Util\DateTimeFormat;
11 * Database Cache Driver
13 * @author Hypolite Petovan <mrpetovan@gmail.com>
15 class DatabaseCacheDriver extends AbstractCacheDriver implements ICacheDriver
17 public function get($key)
19 $cache = dba::selectFirst('cache', ['v'], ['`k` = ? AND `expires` >= ?', $key, DateTimeFormat::utcNow()]);
21 if (DBM::is_result($cache)) {
22 $cached = $cache['v'];
23 $value = @unserialize($cached);
25 // Only return a value if the serialized value is valid.
26 // We also check if the db entry is a serialized
27 // boolean 'false' value (which we want to return).
28 if ($cached === serialize(false) || $value !== false) {
36 public function set($key, $value, $ttl = Cache::FIVE_MINUTES)
39 'v' => serialize($value),
40 'expires' => DateTimeFormat::utc('now + ' . $ttl . 'seconds'),
41 'updated' => DateTimeFormat::utcNow()
44 return dba::update('cache', $fields, ['k' => $key], true);
47 public function delete($key)
49 return dba::delete('cache', ['k' => $key]);
52 public function clear($outdated = true)
55 return dba::delete('cache', ['`expires` < NOW()']);
57 return dba::delete('cache', ['`k` IS NOT NULL ']);