在作曲家需要后找不到类[重复]

Question

我正在关注article学习php和composer

我尝试使用外部依赖composer require phpunit/php-timer。

这是我的 composer.json：

{
  "name": "ypapax/composer_php_hello_world_log4php",
  "minimum-stability": "dev",
  "require": {
    "php": ">= 7.2",
    "phpunit/php-timer": "^2.1@dev"
  },
  "autoload": {
    "psr-0": {
      "HelloWorld": "src/"
    },
    "classname": {
      "PHP_Timer": "src/"
    }
  }
}

还有我的test.php：

<?php

// Autoload files using Composer autoloader.
require_once __DIR__ . '/../vendor/autoload.php';

use HelloWorld\Greetings;

echo Greetings::sayHelloWorld();

greetings.php 在哪里

<?php

namespace HelloWorld;

use PHP_Timer;

class Greetings
{
    public static function sayHelloWorld()
    {
        $timer = new PHP_Timer();
        $timer . start();
        return 'Hello World\n' . $timer->resourceUsage() . "\n";
    }
}

当我运行测试时php tests/test.php 它给了我一个错误：

PHP Fatal error:  Uncaught Error: Class 'PHP_Timer' not found in composer_php_hello_world_log4php/src/HelloWorld/Greetings.php:11
Stack trace:
#0 composer_php_hello_world_log4php/tests/test.php(8): HelloWorld\Greetings::sayHelloWorld()
#1 {main}
  thrown in composer_php_hello_world_log4php/src/HelloWorld/Greetings.php on line 11

Fatal error: Uncaught Error: Class 'PHP_Timer' not found in composer_php_hello_world_log4php/src/HelloWorld/Greetings.php:11
Stack trace:
#0 composer_php_hello_world_log4php/tests/test.php(8): HelloWorld\Greetings::sayHelloWorld()
#1 {main}
  thrown in composer_php_hello_world_log4php/src/HelloWorld/Greetings.php on line 11

我猜 composer.json 有问题：

"classname": {
      "PHP_Timer": "src/"
    }

PHP版本：

$ php --version
PHP 7.3.9 (cli) (built: Sep 14 2019 18:07:55) ( NTS )

链接到我的test repo

更新

这是我的文件autoload_namespaces.php：

<?php

// autoload_namespaces.php @generated by Composer

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

return array(
    'HelloWorld' => array($baseDir . '/src'),
);

还有autoload_classmap.php：

<?php

// autoload_classmap.php @generated by Composer

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

return array(
    'SebastianBergmann\\Timer\\Exception' => $vendorDir . '/phpunit/php-timer/src/Exception.php',
    'SebastianBergmann\\Timer\\RuntimeException' => $vendorDir . '/phpunit/php-timer/src/RuntimeException.php',
    'SebastianBergmann\\Timer\\Timer' => $vendorDir . '/phpunit/php-timer/src/Timer.php',
);

Answer 1

您没有加载正确的namespace。我建议你在包裹页面上查看examples

Answer 2

我认为你的composer.json 不需要这个：

"classname": {
  "PHP_Timer": "src/"
}

根据https://github.com/sebastianbergmann/php-timer/blob/master/src/Timer.php你需要

use SebastianBergmann\Timer\Timer as PHP_Timer;

在您的 greetings.php 文件中。

Answer 3

Greetings 类中缺少 use 语句：

<?php

namespace HelloWorld;

use SebastianBergmann\Timer\Timer;

class Greetings
{
    public static function sayHelloWorld()
    {
        $timer = new Timer();
        $timer::start();
        return 'Hello World\n' . $timer->resourceUsage() . "\n";
    }
}

这可以从composer.json中删除：

    "classname": {
      "PHP_Timer": "src/"
     }