Lumen generate app key code

code.php

<?php
// Use command line in generate.sh
// Generation code line by line
include __DIR__ . "/vendor/autoload.php";

include __DIR__ . "/bootstrap/app.php";

// Check https://github.com/laravel/framework/blob/8.x/src/Illuminate/Foundation/Console/KeyGenerateCommand.php
$key = "base64:" . base64_encode(Illuminate\Encryption\Encrypter::generateKey(config("app.cipher")));

file_put_contents(
  __DIR__ . "/.env",
  preg_replace(
    "/^APP_KEY\=/m", 
    "APP_KEY=" . $key,
    file_get_contents(__DIR__ . "/.env")
  )
);

generate.sh

# Only for empty APP_KEY
php -r 'include __DIR__."/vendor/autoload.php";include __DIR__."/bootstrap/app.php";$key="base64:".base64_encode(Illuminate\Encryption\Encrypter::generateKey(config("app.cipher")));file_put_contents(__DIR__."/.env",preg_replace("/^APP_KEY\=/m","APP_KEY=".$key,file_get_contents(__DIR__."/.env")));';