/** * 构建数据操作实例 * * @param string $table * @param null $as * @param null $db_conf */ public function __construct($table, $as = null, $db_conf = null) { $this->table_raw = $table; $this->config = FDB::getConfig(); $this->table = $this->_table = "`{$this->config['table_pre']}{$table}`"; if ($as) { $this->_table = $this->_table . " as {$as}"; } if ($db_conf) { $this->db_conf = $db_conf; } }