wherehas with when function in laravel eloquent code example

Example 1: laravel wherehas

$users = User::whereHas('posts', function($q){
    $q->where('created_at', '>=', '2015-01-01 00:00:00');
})->get();
// only users that have posts from 2015 on forward are returned

Example 2: orwhere in wherehas laravel

User::select()->whereHas('student', $function($q) {
        $q->where('name', $value)
          ->orWhere('age', $value2);
    });