<?phpclass db{ public $table=null; public $pdo; public $where=null; //where 条件 public $field=null; //要查询的条件 public function __construct() { $this->pdo=new PDO("mysql:host=127.0.0.1;dbname=1611b","root","root"); } public…
//注意要先引入含有封装类的文件文件:如下: <?phpclass Db{ public $host='127.0.0.1'; public $user='root'; public $pass='root'; public $name='day4'; public $link; function __construct() { $this->link= mysqli_connect($this->host,$this->user,$this->pass,$this->…