61 lines
1.3 KiB
PHP
61 lines
1.3 KiB
PHP
<?php
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namespace Friendica\Core\Cache;
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use dba;
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use Friendica\Core\Cache;
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use Friendica\Database\DBM;
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use Friendica\Util\DateTimeFormat;
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/**
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* Database Cache Driver
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*
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* @author Hypolite Petovan <mrpetovan@gmail.com>
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*/
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class DatabaseCacheDriver extends AbstractCacheDriver implements ICacheDriver
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{
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public function get($key)
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{
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$cache = dba::selectFirst('cache', ['v'], ['`k` = ? AND `expires` >= ?', $key, DateTimeFormat::utcNow()]);
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if (DBM::is_result($cache)) {
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$cached = $cache['v'];
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$value = @unserialize($cached);
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// Only return a value if the serialized value is valid.
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// We also check if the db entry is a serialized
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// boolean 'false' value (which we want to return).
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if ($cached === serialize(false) || $value !== false) {
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return $value;
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}
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}
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return null;
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}
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public function set($key, $value, $ttl = Cache::FIVE_MINUTES)
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{
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$fields = [
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'v' => serialize($value),
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'expires' => DateTimeFormat::utc('now + ' . $ttl . 'seconds'),
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'updated' => DateTimeFormat::utcNow()
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];
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return dba::update('cache', $fields, ['k' => $key], true);
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}
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public function delete($key)
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{
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return dba::delete('cache', ['k' => $key]);
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}
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public function clear($outdated = true)
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{
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if ($outdated) {
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return dba::delete('cache', ['`expires` < NOW()']);
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} else {
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return dba::delete('cache', ['`k` IS NOT NULL ']);
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}
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}
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}
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