Creating a CakePHP 3 migration using Faker to input data.

BasicFakerMigration.php

<?php
use Phinx\Migration\AbstractMigration;
use Faker\Factory as Faker;
use Faker\ORM\CakePHP\Populator;

class Seed extends AbstractMigration
{
    public function up() {
        $faker = Faker::create();
        $populator = new Populator($faker);
        $populator->addGuesser('\Faker\Guesser\Name');

        $created = $modified = function () use ($faker) {
            static $beacon;
            $ret = $beacon;
            if (empty($ret)) {
                return $beacon = $faker->dateTimeThisDecade();
            }
            $beacon = null;
            return $ret;
        };
        $timestamp = compact('created', 'modified');

        $name = $faker->realText(25, 2);

        $populator->addEntity('Contents', 10, [
                'name' => function () use ($name) { return $name; },
                'slug' => function () use ($name) { return \Cake\Utility\Inflector::slug($name); },
                'content_type_id' => function () use ($faker) { return $faker->numberBetween(1, 2); },
                'content' => function () use ($faker) { return $faker->text(); },
                'provider_id' => function () { return array_rand([1, 2, 3, 4, 5, 6, null]); },
                'status_id' => function () use ($faker) { return $faker->numberBetween(1, 4); }
            ] + $timestamp);

        $populator->execute(['validate' => false]);
    }
}