Présentation de la classe d'encapsulation PHP7.3.5 pour accéder à la base de données MySQL

<?php
class Model{
    // 表名属性
    public $table;
    public $connect;
    //构造方法以及表名赋值
    public function __construct($t){
        $this->table=$t;
        
    }
    private function conn(){
        $servername = "localhost";
        $username = "root";
        $password = "133";
        $dbname = "myweb";
        // 创建连接
       
       if($conn=mysqli_connect($servername, $username, $password, $dbname)){
            return $this->connect=$conn;
       }
        

    }
    //select查询
    public function select(){
    $this->conn();  
    $sql="SELECT * FROM {$this->table}";
    $rst=mysqli_query($this->connect,$sql);
    while($row=mysqli_fetch_assoc($rst)){
        $rows[]=$row;
    }
    return $rows;
    }
}
?>

<?php
function M($name){
    return new Model($name);
}

?>

<?php
include "Model.class.php";
include &#39;function.inc.php&#39;;



$rows=M(&#39;user&#39;)->select();

echo &#39;<pre class="brush:php;toolbar:false">&#39;;
print_r($rows);
echo &#39;