Symfony依賴注入和您自己的服務

Question

我試圖借助symfony依賴項注入組件將自己的類注冊為服務，但類加載遇到問題。

我有這樣的文件結構：

我的Generator類很簡單

<?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();

我得到的是一個錯誤

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

或作為圖片

Answer 1

解決方案很簡單，我忘了修改composer config來加載我的服務

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

Answer 2

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

Answer 3

編輯： 自Symfony 3.3+ （2017年5月）起，您可以使用register()類名稱服務快捷方式：

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

---

從PHP 5.5+開始，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');

現在，當類名輸入錯誤時，您的IDE將突出顯示它。

Answer 4

加法 ：

出於性能原因，您應該編譯該容器。

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