Symfony依赖注入和您自己的服务

Question

我试图借助symfony依赖项注入组件将自己的类注册为服务，但类加载遇到问题。

我有这样的文件结构：

我的Generator类很简单

<?php

namespace Localhost\Service\String;

class Generator {

    private $iStringLength;

    public function __construct($iNewStringLength = 5) {
        $this->iStringLength = $iNewStringLength;
    }

    public function getRandomString() {
        $sChars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
        $sRandChar = substr(str_shuffle(str_repeat($sChars,5)),0, $this->iStringLength);

        return $sRandChar;
    }
}

索引是

<?php

require_once 'vendor/autoload.php';

/*
spl_autoload_register(function ($sClass) {
    echo $sClass;
    require_once str_replace('\\', '/', $sClass) . '.php';
});
*/

use Localhost\Service\String\Generator;

/*
$oStringGenerator = new Generator(55);
echo $oStringGenerator->getRandomString();
*/

use Symfony\Component\DependencyInjection\ContainerBuilder;

$oContainer = new ContainerBuilder();
$oContainer
    ->register('generator', 'Generator')
    ->addArgument('15');

$oGeneratorService = $oContainer->get('generator');
echo $oGeneratorService->getRandomString();

我得到的是一个错误

Fatal error: Uncaught exception 'ReflectionException' with message 'Class Generator does not exist' in D:\Localhost\Apache\htdocs\Test\vendor\symfony\dependency-injection\Symfony\Component\DependencyInjection\ContainerBuilder.php:959 Stack trace: #0 D:\Localhost\Apache\htdocs\Test\vendor\symfony\dependency-injection\Symfony\Component\DependencyInjection\ContainerBuilder.php(959): ReflectionClass->__construct('Generator') #1 D:\Localhost\Apache\htdocs\Test\vendor\symfony\dependency-injection\Symfony\Component\DependencyInjection\ContainerBuilder.php(493): Symfony\Component\DependencyInjection\ContainerBuilder->createService(Object(Symfony\Component\DependencyInjection\Definition), 'generator') #2 D:\Localhost\Apache\htdocs\Test\index.php(26): Symfony\Component\DependencyInjection\ContainerBuilder->get('generator') #3 {main} thrown in D:\Localhost\Apache\htdocs\Test\vendor\symfony\dependency-injection\Symfony\Component\DependencyInjection\ContainerBuilder.php on line 959

或作为图片

Answer 1

解决方案很简单，我忘了修改composer config来加载我的服务

"autoload": {
    "psr-0": {"Localhost": "src/"}
},

Answer 2

$oContainer = new ContainerBuilder();
$oContainer
    ->register('generator', 'Localhost\Service\String\Generator')
    ->addArgument('15');

Answer 3

编辑： 自Symfony 3.3+ （2017年5月）起，您可以使用register()类名称服务快捷方式：

$containerBuilder = new ContainerBuilder();
$containerBuilder->register(Localhost\Service\String\Generator::class)
    ->addArgument('15');

---

从PHP 5.5+开始，您可以使用更多的防故障::class表示法：

$containerBuilder = new ContainerBuilder();
$containerBuilder->register('generator', Localhost\Service\String\Generator::class)
    ->addArgument('15');

现在，当类名输入错误时，您的IDE将突出显示它。

Answer 4

加法 ：

出于性能原因，您应该编译该容器。

$container = new ContainerBuilder();
$container
    ->register('generator', 'Localhost\Service\String\Generator')
    ->addArgument('15')
;
$container->compile();