`Cannot redeclare` error raises frequently

[balthild]

Log:

  Cannot redeclare me() (previously declared in /Users/balthild/Projects/PHP/MyProject/app/helpers.php:11)

  at app/helpers.php:11
      7▕ use Illuminate\Support\Str;
      8▕ 
      9▕ const UNIX_NEWLINE = "\n";
     10▕ 
  ➜  11▕ function me($guard = null): ?User
     12▕ {
     13▕     return auth($guard)->user();
     14▕ }
     15▕

      �[2m+1 vendor frames �[22m

  2   [internal]:0
      Whoops\Run::handleShutdown()

helper.php is a non-PSR autoloaded file:

{
  "autoload": {
    "files": [
      "app/helpers.php"
    ],
    "psr-4": {
      "App\\": "app/",
      "Database\\Factories\\": "database/factories/",
      "Database\\Seeders\\": "database/seeders/"
    }
  },
}

[juanhuerta]

The same to me, I had to apply a lot of if (!function_exists('xxxx')) { to each function of my helper file, but it is not the way to solve this.