public static function get_both_conn() { if (self::$both_conn === null) { $d = self::$daemons['master']; $dsn = $d['host'] . $d['user'] . $d['pass'] . $d['name'] . $d['port']; if (isset(self::$conns[$dsn])) { $conn = self::$conns[$dsn]; } else { $conn = mysqli_connect($d['host'], $d['user'], $d['pass'], $d['name'], $d['port']); if (!$conn) { exit('Cannot connect to master'); } self::$conns[$dsn] = $conn; } self::$both_conn = $conn; } return self::$both_conn; }