faker.php

<?php 

//https://www.wanadev.fr/123-grace-a-faker-generez-des-donnees-aleatoires-dans-votre-base-de-donnees/
// composer require fzaninotto/faker

namespace AppBundle\DataFixtures\ORM;

use AppBundle\Entity\User;

use Doctrine\Common\DataFixtures\AbstractFixture;
use Doctrine\Common\DataFixtures\FixtureInterface;
use Doctrine\Common\DataFixtures\OrderedFixtureInterface;
use Doctrine\Common\Persistence\ObjectManager;
use Faker;
use Symfony\Component\DependencyInjection\ContainerAwareInterface;
use Symfony\Component\DependencyInjection\ContainerInterface;

class LoadUsers extends AbstractFixture implements ContainerAwareInterface, FixtureInterface, OrderedFixtureInterface
{
    private $container;

    public function setContainer(ContainerInterface $container = null)
    {
        $this->container = $container;
    }

    public function load(ObjectManager $em)
    {
        // initialisation de l'objet Faker
        // on peut préciser en paramètre la localisation, 
        // pour avoir des données qui semblent "françaises"
        $faker = Faker\Factory::create('fr_FR');

        $populator = new Faker\ORM\Doctrine\Populator($faker, $em);
        $populator->addEntity(User::class, 10); 
        // le deuxième paramètre (10) correspond au nombre d'objets qui vont être créés
        $insertedPKs = $populator->execute();
    }

    public function getOrder()
    {
        return 1;
    }
}

// -------------------

class LoadData extends AbstractFixture implements ContainerAwareInterface, FixtureInterface, OrderedFixtureInterface
{
    private $container;

    public function setContainer(ContainerInterface $container = null)
    {
        $this->container = $container;
    }

    public function load(ObjectManager $em)
    {
        // initialisation de l'objet Faker
        $faker = Faker\Factory::create('fr_FR');

        // créations des shops
        $shops = [];
        for ($i=0; $i < 10; $i++) {
            $shops[$i] = new Shop();
            $shops[$i]->setName($faker->company)
                ->setSiret($faker->siret)
                ->setReference($faker->numberBetween(111111, 999999))
                ->setContactName($faker->name)
                ->setAddress($faker->address)
            ;
            $em->persist($shops[$i]);
        }

        // créations des customers
        $customers = [];
        for ($k=0; $k < 50; $k++) {
            $customers[$k] = new Customer();
            $customers[$k]->setFirstName($faker->firstName)
                ->setLastName($faker->lastName)
                ->setEmail($faker->mail)
                ->setPhone($faker->phone)
                ->setAddress($faker->address)
            ;

            // on récupère un nombre aléatoire de Shops dans un tableau
            $randomShops = (array) array_rand($shops, rand(1, count($shops)));
            // puis on les ajoute au Customer
            foreach ($randomShops as $key => $value) {
                $customers[$k]->addShop($shops[$key]);
            }
            $em->persist($customers[$k]);
        }

        $em->flush();
    }

    public function getOrder()
    {
        return 1;
    }
}