php操作数据类的封装（入门级）

<?php //操作数据库的类define( 'IN_PHP',1);if(!defined('PATHS')){ //常量PATHS未定义define('PATHS',str_replace('\\','//',dirname(dirname(__FILE__))));}include PATHS.'/include/mysql.class.php';$dbObj = new db_mysql('localhost','root','root','detection');$number="select number from posen_num";$res_number=$dbObj->getall($number);$arr_number = array_column($res_number,'number');var_dump($arr_number);?>