致命错误：未捕获的错误：找不到类“todo\views\DataBase”

Question

我正在使用composer 到autoload 我的课程。

我的文件夹结构：

mytodo
     - src
        -app
            IDb.php
        -views
            db.php
            todos.php
     - web
         index.php
     -composer.json

试图从todos.php__constructor()继承Database类。但是给出这个错误！！！

tod​​os.php

<?php
namespace todo\views;
use todo\app\IDb;

class Todo extends DataBase implements IDb{

    public function __construct() 
    {
         $newdb = new DataBase();
         $connection = $newdb->connect();
    }
}

composer.json

{
    "name": "todo/website",
    "description": "This is a TODO App",
    "minimum-stability": "stable",
    "autoload": {
        "psr-4": {
            "todo\\": "src/"
        }
    },
    "require": {
        "php": ">=7.2.0"
    }
}

db.php

<?php
namespace todo\views;
use todo\app\IDb;

abstract class DataBase implements IDb{

    private $user;
    private $host;
    private $pass;
    private $db;
    protected $connection;

    public function __construct()
    {
        $this->user = "root";
        $this->host = "localhost";
        $this->pass = "";
        $this->db = "db_todos";
    }

    public function connect()
    {
        $connection = mysqli_connect($this->host, $this->user, $this->pass, $this->db);
        return $connection;
    }
}
?>

数据库接口：

<?php
namespace todo\app;

interface IDb {
    public function connect() : string;
}

无法找出问题所在。请提前帮助我。

Answer 1

这是因为命名错误。 PSR-4 自动加载意味着文件名与类名匹配。

解决方法：根据类名重命名文件：todos.php变成ToDo.php，db.php变成DataBase.php。