关于PHP和MVC的Beginner问题

关于PHP和MVC的Beginner问题,php,pdo,Php,Pdo,我试图学习PHP的MVC架构。所以我玩一些简单的类和函数。我找不到这段代码有什么问题,它返回一个: 致命错误:对中的非对象调用成员函数fetch() /打开opt/lampp/htdocs/test/MVC/Vue.php 第15行 这是我的密码: Model.php: class News { public function ConnBdd() { $this->bdd = new PDO('mysql:host=localhost;dbname=db30159

我试图学习PHP的MVC架构。所以我玩一些简单的类和函数。我找不到这段代码有什么问题,它返回一个:

致命错误:对中的非对象调用成员函数fetch() /打开opt/lampp/htdocs/test/MVC/Vue.php 第15行

这是我的密码:

Model.php:

class News {
    public function ConnBdd() {
        $this->bdd = new PDO('mysql:host=localhost;dbname=db301591273', 'root', '');
        $this->query = "SELECT Nom,IdTest,Image,DATE_FORMAT(DateCreation, '%Y-%m-%d') AS DateCreation FROM Questionnaires WHERE autorise='1' ORDER BY DateCreation DESC LIMIT 0, 4";
        $this->preparedQuery = $this->bdd->prepare($this->query);
        $this->executedQuery = $this->preparedQuery->execute();
    }
 }
Controller.php

class Controller {
    public $Model;
    public $View;
    public $News;
    public function ShowNews(){
        $this->News->ConnBdd();
        $this->View->ShowDaNews();
    }
}
View.php

class View {
    public $Model;
    public $News;

    public function ShowDaNews() {
        while ($c = $this->News->executedQuery->fetch()) {?>
    <tr>
    <td class="tableImg"><?echo '<img src="/img/ico/'.$tests['Image'].'.png" />'?></td>
    <td class="tableTest"><?echo '<a href="/page/php?t='.$tests['IdTest'].'">'.$tests['Nom'].'</a>'?></td>
    </tr>
            <?}
       }
}

感谢您的帮助。

您误解了PDO中准备好的语句,在课堂新闻中,切换以下内容:

$this->preparedQuery = $this->bdd->prepare($this->query);
$this->executedQuery = $this->preparedQuery->execute();
…为了这个

$this->preparedQuery = $this->bdd->prepare($this->query);
$this->preparedQuery->execute();
$this->executedQuery = $this->preparedQuery;

你误解了PDO中准备好的陈述,在课堂新闻中,切换如下:

$this->preparedQuery = $this->bdd->prepare($this->query);
$this->executedQuery = $this->preparedQuery->execute();
…为了这个

$this->preparedQuery = $this->bdd->prepare($this->query);
$this->preparedQuery->execute();
$this->executedQuery = $this->preparedQuery;

要扩展Robin的答案,返回值$stmt->execute()是一个布尔值,指示语句是否成功执行

另一方面,如果您正在进行面向对象编程,则应设置PDO::ERRMODE设置,以便在语句失败时抛出异常:

$pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

请参见

展开Robin的答案,$stmt->execute()的返回值是一个布尔值,指示语句是否成功执行

另一方面,如果您正在进行面向对象编程,则应设置PDO::ERRMODE设置,以便在语句失败时抛出异常:

$pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

请看

很高兴我停止使用PHP。。。我讨厌这垃圾。很高兴我停止使用PHP。。。我讨厌那种垃圾。