# the slugger service needs a public alias for getting it from # the container when loading doctrine fixtures
slugger:                             symfony3.4注册方法     alias: AppBundle\Utils\Slugger     public: true

<?php
/*** Created by PhpStorm.* User: 亦清* Date: 2019/3/13* Time: 20:06*/namespace AppBundle\Twig;
use AppBundle\Utils\Markdown;
use Twig\Extension\AbstractExtension;
use Twig\TwigFilter;//放置头一个扩展的类class AppExtension extends AbstractExtension
{/*** @var Markdown*/private $parser;public function __construct(Markdown $parser){$this->parser = $parser;     //使用markdown来初始化，用于后面的过滤
    }/*** 将父类的注释都继承下来* {@inheritdoc}*/public function getFilters(){      //twig模板过滤return [new TwigFilter('md2html',[$this,'markdownToHtml']),];}/*** 过滤函数* @param string $content* @return string*/public function markdownToHtml($content){$this->parser->toHtml($content);return $content;}/***{@inheritdoc}*/public function getName(){return "app.extension";}}

    app.twig_extension:   #注册扩展appExtension扩展public: falseclass: AppBundle\Twig\AppExtensionarguments: ['@markdown']tags:-{name: twig.extension}

composer require --dev doctrine/doctrine-fixtures-bundle

use Symfony\Component\DependencyInjection\ContainerAwareInterface;   //容器组件，将东西注入到容器当中，之后便可以使用
use Symfony\Component\DependencyInjection\ContainerInterface;
use Symfony\Component\Finder\Finder;    //symfony目录组件，遍历组件，取出文件内容

/*** @var ContainerInterface*/private $container;/*** 构造方法构建一个容器，* @Param ContainerInterface $container*/public function setContainer(ContainerInterface $container = null){$this->container =$container;}　　

public function load(ObjectManager $manager){    $posts = array(        ['title' => '第一讲:Symfony3的简介,开发环境与版本控制', 'cate' => 'symfony3-practis'],        ['title' => '第二讲: 最佳实践与第一个Symfony应用', 'cate' => 'symfony3-practis'],        ['title' => '第三讲: 创建初步用户系统', 'cate' => 'symfony3-practis'],    );    $post_file_path = $this->container->getParameter('kernel.root_dir').'/data/fixtures/posts';  //用容器的get方法获取文件目录    $find = new Finder();             　　　　　　　　　　//使用symfony目录对象遍历组件进行文件遍历,    $find->files()->in($post_file_path);    $i = 0;    foreach($find as $file){  //遍历文件获取其中内容，放入到posts当中        $posts[$i]['content'] =$file->getContents();        $i++;    }    foreach($posts as $post){                           $product = new Post();        $product->setTitle($post['title']);        $product->setContent($post['content']);        $product->setCategory($this->getReference('category-'.$post['cate']));         //设置其分类，使用getReference        $manager->persist($product);        $manager->flush();    }}