php - 不将数据插入数据库表

Question

我正在尝试将一些数据插入到我的 testimage 表中；但是，它没有插入它。它不会返回任何错误，我只知道它没有插入，因为我的插入语句有一个 if/else 语句。我知道它已连接到我的数据库，因为我执行了 try/catch 语句。

这是我的代码:

<?php

  require_once "Connection.php";
  $dbconnection = new Database('localhost', 'root', '', 'cardimages');

  $Name = $_POST['cardname'];
  $Colour = $_POST['colour'];
  $Rarity = $_POST['rarity'];

  $CardQuery = "INSERT INTO `testimage` (`Name`, `Colour`, `Rarity`) VALUES (:Name, :Colour, :Rarity)";

  $CardResult = $dbconnection->Connection->prepare($CardQuery);
  $CardExec = $CardResult->execute(array(":Name"=>$Name,":Colour"=>$Colour,":Rarity"=>$Rarity));

  if ($CardExec) {
    Echo "The data was inserted!";
  } else {
    echo "The data wasn't inserted!";
  }

  $query_array = array('name'=>$_POST['cardname'], 'type'=> 'card', '.jpg');
  $url = "http://gatherer.wizards.com/Handlers/Image.ashx?".http_build_query($query_array);
  $img = "Images/" . ucwords($Name) . ".png";
  file_put_contents($img, file_get_contents($url));

?>

这是我的 Connection.php 文件:

<?php

  Class Database {

    private $hostname;
    private $username;
    private $password;
    private $database;
    public $Connection;

    public function __construct($hostname, $username, $password, $database) {

        $this->hostname;
        $this->username;
        $this->password;
        $this->database;
        $this->Connect();

    }

    private function SetHostname($hostname) {

      $this->hostname = $hostname;

      return $this;

    }

    private function SetUsername($username) {

      $this->username = $username;

      return $this;

    }
    private function SetPassword($password) {

      $this->password = $password;

      return $this;

    }
    private function SetDatabase($database) {

      $this->database = $database;

      return $this;

    }

    public function GetHostname()  {

      return $this->hostname;

    }

    public function GetUsername()  {

      return $this->username;

    }

    public function GetPassword()  {

      return $this->password;

    }

    public function GetDatabase()  {

      return $this->database;

    }

    private function Connect() {

      try
       {
         $db = $this->Connection = new PDO('mysql:host=' . $this->hostname . ';dbname=' . $this->database . '', $this->username, $this->password);

         echo "This connected successfully!";

       }
       catch (PDOException $e)
       {

         echo "It didn't connect to the database!";

       }

        }

      }

    ?>

Answer 1

Database::__construct 中的前 4 行做什么？

提示:$this->hostname=$hostname; 或 $this->SetHostname($hostname)

目前也许(但我不这么认为)连接有效，但 cardimages 从未被选中。