php code to generate .env from elasticbeanstalk environment variables

setup.php

<?php

// setup .env from $_ENV
file_put_contents('/var/www/html/.env', '');
foreach ($_ENV as $key => $value)
{
  if (
    strpos($key, 'PHP_') === 0 ||
    strpos($key, 'NOTIFY_') === 0 ||
    strpos($key, 'HTTP_') === 0 ||
    strpos($key, 'SCRIPT_') === 0 ||
    strpos($key, 'SERVER_') === 0 ||
    strpos($key, 'GATEWAY_') === 0 ||
    strpos($key, 'REQUEST_') === 0 ||
    strpos($key, 'DOCUMENT_') === 0 ||
    strpos($key, 'FCGI_') === 0 ||
    strpos($key, 'REMOTE_') === 0 ||
    strpos($key, 'PATH_') === 0 ||
    strpos($key, 'CONTENT_') === 0 ||
    strpos($key, 'QUERY_') === 0 ||
    strpos($key, 'REDIRECT_') === 0 ||
    
    $key === 'USER' || $key === 'HOME' || $key === 'LANG'
    || $key === 'PATH'
    )
  {
    continue;
  }
  file_put_contents('/var/www/html/.env', $key.'='.$value."\n", FILE_APPEND);
}

echo 'DONE';