Level 73
Aren't you using it wrong? Radio buttons are used more to select one option out of many, and checkbox is used more for multiple selection, so you should not have a name as an array on the radio button. Then a simple check if the old value is the same as the one selected you should print out checked.
<input type="radio" name="radio" value="1" {{ old("radio") == '1' ? 'checked' : '' }}>
if you use checkbox instead or the name as an array just check if the value is contained in the array.
<input type="radio" name="radio[]" value="1" {{ in_array('1', old("radio")) ? 'checked' : '' }}>
Let me know if it works.
