?提示信息：mysql_connect(): The mysql extension is deprecated and will be removed in the future: use mysqli or PDO instead我的源碼是：<?phpclass mysql{ protected $db_prefix; protected $conn; protected $distinct = ''; protected $where = ''; protected $table = ''; protected $field = ''; protected $order = ''; protected $limit = ''; protected $data = ''; protected $join = ''; public $select_count = 0; public $last_sql = ''; public $lastInsID = 0; public function __construct() { if (!function_exists('mysql_connect')) { pigcms_tips('服務(wù)器空間PHP不支持MySql數(shù)據(jù)庫', 'none'); } global $_G; $this->db_prefix = $_G['system']['DB_PREFIX']; if (!$this->conn = @mysql_connect($_G['system']['DB_HOST'], $_G['system']['DB_USER'], $_G['system']['DB_PWD'])) { switch ($this->geterrno()) { case 2005: pigcms_tips('連接數(shù)據(jù)庫失敗，數(shù)據(jù)庫地址錯誤或者數(shù)據(jù)庫服務(wù)器不可用', 'none'); break; case 2003: pigcms_tips('連接數(shù)據(jù)庫失敗，數(shù)據(jù)庫端口錯誤', 'none'); break; case 2006: pigcms_tips('連接數(shù)據(jù)庫失敗，數(shù)據(jù)庫服務(wù)器不可用', 'none'); break; case 1045: pigcms_tips('連接數(shù)據(jù)庫失敗，數(shù)據(jù)庫用戶名或密碼錯誤', 'none'); break; default: pigcms_tips('連接數(shù)據(jù)庫失敗，請檢查數(shù)據(jù)庫信息。錯誤編號：' . $this->geterrno(), 'none'); break; } } if ('4.1' < $this->getMysqlVersion()) { mysql_query('SET NAMES \'utf8\''); }