使用php composer加载类时遇到的问题

Question

我有这样一个目录网站：

- my application
- apps
--- Backend
--- Core
---- Core \ Config
---- Core \ Drivers (Db.php)
---- Core \ Main
--- Frontend

我的composer.json文件：

{
    "autoload": {
        "psr-4": {
            "Core\\": "apps/Core/",
            "Web\\": "apps/Frontend",
            "Cms\\": "apps/Backend"
        }
    },
    "require": {
        "php": ">=7.0",
        "phpmailer/phpmailer": "~6.0",
        "monolog/monolog": "~1.23",
        "mpdf/mpdf": "~7.0",
        "twig/twig": "~2.5"
    },
    "config": {
        "vendor-dir": "apps/vendor"
    }
}

当我想在文件中调用我的应用程序\ index.php时：

require_once ("../apps/vendor/autoload.php");
use Core\Drivers;
use Core\Main;
$bl = new Core\Drivers\Db();

Db.php文件如下所示：

namespace Core\Drivers;


class Db
{

...

}

我收到一个错误：

致命错误:未捕获错误:未在

为什么？

编辑

// autoload_psr4.php @generated by Composer

$vendorDir = dirname(dirname(__FILE__));
$baseDir = dirname(dirname($vendorDir));

return array(
    'Web\\' => array($baseDir . '/apps/Frontend'),
    'Twig\\' => array($vendorDir . '/twig/twig/src'),
    'Symfony\\Polyfill\\Mbstring\\' => array($vendorDir . '/symfony/polyfill-mbstring'),
    'Symfony\\Polyfill\\Ctype\\' => array($vendorDir . '/symfony/polyfill-ctype'),
    'Psr\\Log\\' => array($vendorDir . '/psr/log/Psr/Log'),
    'PHPMailer\\PHPMailer\\' => array($vendorDir . '/phpmailer/phpmailer/src'),
    'Mpdf\\' => array($vendorDir . '/mpdf/mpdf/src'),
    'Monolog\\' => array($vendorDir . '/monolog/monolog/src/Monolog'),
    'DeepCopy\\' => array($vendorDir . '/myclabs/deep-copy/src/DeepCopy'),
    'Core\\' => array($baseDir . '/apps/Core'),
    'Cms\\' => array($baseDir . '/apps/Backend'),
);

Answer 1

一切看起来都很酷，但我建议您将secret/index.php的内容更改为：

require_once __DIR__.'/../apps/vendor/autoload.php';   //A cleaner approach for requiring files

use Core\Drivers\Db;    //So, you don't have to use slash when using your class in your code.
use Core\Main;

$bl = new Db();

Answer 2

使用根目录，如下所示：

use \Core\Drivers;
use \Core\Main;
$bl = new \Core\Drivers\Db();

在根目录中使用php将在当前命名空间中搜索给定的类。