PHP PDO面向对象数据库连接：参数配置与常见错误解析

// 假设 $this->options 是一个数组
$this->connect = new PDO(
    "mysql:host=$this->host; dbname=$this->database",
    "$this->username",
    "$this->password",
    "$this->options" // 错误：将数组用双引号包裹
);

Warning: Array to string conversion in ... on line XX
Fatal error: Uncaught TypeError: PDO::__construct(): Argument #4 ($options) must be of type ?array, string given in ... on line XX

class vicass
{
    var $host;
    var $username;
    var $password;
    var $database;
    var $connect;
    var $home_page;
    var $query;
    var $data;
    var $statement;
    var $filedata;
    var $options; // 声明为类属性

    function __construct()
    {
        $this->host = 'localhost';
        $this->username = 'root';
        $this->password = '';
        $this->database = 'vicas';
        $this->home_page = 'http://localhost/Vicas/index.php';

        // 正确定义PDO连接选项数组
        $this->options = array(
            PDO::ATTR_ERRMODE            => PDO::ERRMODE_EXCEPTION,   // 错误模式：抛出异常
            PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_OBJ,           // 默认取回模式：以对象形式
            PDO::ATTR_EMULATE_PREPARES   => false,                    // 关闭模拟预处理
        );

        // 正确的PDO连接语句：$this->options 不加引号
        $this->connect = new PDO(
            "mysql:host=$this->host; dbname=$this->database",
            $this->username, // username和password变量本身就是字符串，无需引号
            $this->password,
            $this->options   // 正确：直接传递数组变量
        );

        session_start();
    }

    // 其他方法保持不变...
    function execute_query()
    {
        $this->statement = $this->connect->prepare($this->query);
        $this->statement->execute($this->data);
    }

    function total_row()
    {
        $this->execute_query();
        return $this->statement->rowCount();
    }

    function redirect($page)
    {
        header('location:'.$page.'');
        exit;
    }
}