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# 缓存机制

### 目录

System/libraries/Cache

### 自行封装

```
public static function getRs()
{
    $config = CI::config('redis');
    $redis = new \Redis();
    try {
        if ($redis->connect($config['host'], $config['port'])) {
            $redis->select((int)$config['db']);
        }
    } catch (\Exception $e) {
        return false;
    }
    return $redis;
}
```