Be careful when constructing your custom filtered queries using GET parameters

 1if (request()->has('since')) {
 2    // example.org/?since=
 3    // fails with illegal operator and value combination
 4    $query->whereDate('created_at', '<=', request('since'));
 5}
 6 
 7if (request()->input('name')) {
 8    // example.org/?name=0
 9    // fails to apply query filter because evaluates to false
10    $query->where('name', request('name'));
11}
12 
13if (request()->filled('key')) {
14    // correct way to check if get parameter has value
15}

Tip given by @mc0de