找不到PHP Composer Autoloader类异常 [英] PHP Composer Autoloader Class not Found Exception

问题描述

标题不言自明.这是我的项目结构:

The title speaks itself. So here is my project structure:

|src
    |Database
        |Core
            |MySQL.php
        |Support
    start.php
|vendor
composer.json
index.php

MySQL.php文件:

MySQL.php file:

<?php
namespace Database\Core;
//Some methods here

index.php和start.php文件:

index.php and start.php files:

//start.php file
<?php
require __DIR__ . '/../vendor/autoload.php';
?>

//index.php file
<?php
use Database\Core;
require __DIR__ . '/src/start.php';

$mysql = new MySQL(); // Gets exception Class 'MySQL' cannot found etc.
?>

最后是我的composer.json自动加载部分:

And finally my composer.json autoload part:

"autoload": {
    "psr-4": "Database\\": "src/" // Also tried "src/Database" too
}

问题出在哪里?我真的厌倦了尝试应对这种情况.请大家帮忙！谢谢.

Where is the problem? I'm really tired of trying to cope with this situation. Please help guys! Thanks.

推荐答案

初始化类时，需要包括名称空间:

You need to include namespace when you are initializing a class:

$mysql = new Database\Core\MySQL();

或

use Database\Core\MySQL;
$mysql = new MySQL();

请参见使用名称空间:别名/导入

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