private function s3($S3_bucket = null) { if (isset(self::$s3)) { if (isset($S3_bucket) && self::$s3->current_bucket() !== $S3_bucket) { self::$s3->set_current_bucket($S3_bucket); } return self::$s3; } if (self::$options) { $s3 = S3_helper::get_instance(); $s3->init(isset(self::$options['access_key']) ? self::$options['access_key'] : null, isset(self::$options['secret_key']) ? self::$options['secret_key'] : null, isset(self::$options['region']) ? self::$options['region'] : null); if ($s3 && isset($S3_bucket)) { $s3->set_current_bucket($S3_bucket); } self::$s3 = $s3; return $s3; } return false; }