composer require fakerphp/faker

<?php
require 'vendor/autoload.php';
use Faker\Factory;

class CsvGenerate{
    /**
     * ダミー情報を生成する
     * @param int $max
     * @return string
     */
    public function csvMake(int $max=0):string
    {
        $faker = Factory::create('ja_JP');
        $hasData = [];
        for($i=0;$i<$max;$i++){
            $datas = [];
            $datas[0] = $faker->name();
            $datas[1] = $faker->email();
            $datas[2] = $faker->phoneNumber();
            $datas[3] = $faker->address();
            $hasData[$i] = implode(',',$datas);
        }

        return implode(PHP_EOL,$hasData);
    }
}

print((new CsvGenerate)->csvMake(1000));
//file_put_contents('data.csv',(new CsvGenerate)->csvMake(1000));