用两个类查询 PDO

Question

晚上好，我对从两个 classes 创建的 PHP PDO 查询有疑问。这是用于数据库连接的第一个 class：

class PDOConn {
    protected $HOST = "host";
    protected $DATABASE = "db";
    protected $USER = "usr";
    protected $PASSWORD = "pwd";
    protected $CONN;

    public function __construct() {
        $this->CONN = new PDO("mysql:host=".$this->HOST.";dbname=".$this->DATABASE,$this->USER,$this->PASSWORD);
    }
}

第二个用于注册和登录用户：

class insLog{
    protected $db;
    protected $TheHash = "PASSHASH";

    function __construct(){
        $db = $this->db = new PDOConn();
    }

    function __destruct(){
        $this->db = null; 
    }

    public function reg($nome,$cognome,$password,$email){
        $stmt = $this->db->prepare("SELECT id FROM utenti WHERE cognome = :cognome OR email = :email");
        $stmt->bind_param(array(":cognome"=>cognome,":email"=>email));
        $stmt->execute();
        //Here I wanna use if row instead if there's id so > 0...
        echo $stmt['id'];
        if($stmt['id'] == ""){echo "Lol";}
        //...
    }
}

请记住，我是 OOP 的菜鸟，我是来学习的，我花了将近 3 个小时才弄清楚如何解决，现在我想问：我做错了什么我的代码有什么问题？非常感谢您。

Answer 1

绑定参数的PDO方法是bindParam，不是bind_param。而你需要使用fetch来读取一行结果。如果 SELECT.

没有匹配的行，它将 return false

public function reg($nome,$cognome,$password,$email){
    $stmt = $this->db->prepare("SELECT id FROM utenti WHERE cognome = :cognome OR email = :email");
    $stmt->bindParam(array(":cognome"=>cognome,":email"=>email));
    $stmt->execute();
    $row = $stmt->fetch(PDO::FETCH_ASSOC);
    if(!$row){echo "Lol";}
    //...
}

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