check wheather id is available or not eloquent code example
Example 1: if notexists in laravel query
if (User::where('email', '=', Input::get('email'))->exists()) {
// user found
}
Example 2: check for an existing user laravel eloquent
$users = User::where('email', '=', $request->input('email'))->first();
if ($users === null) {
// User does not exist
} else {
// User exits
}