Laravel:Grab any input that starts with a $string and create validation rules array

gistfile1.php

function get_jsfields($input,$begins_with,$numpos,$validation_string){
        $jsfields = array();
        $getkeys = array_keys($input);
        for($i=0;$i<sizeof($getkeys);$i++){
            if(preg_match("/$begins_with/i", trim($getkeys[$i]))){
            $jsfields[$begins_with.$getkeys[$i][$numpos-1]] = ''.$validation_string.'';
            }
        }
        return $jsfields;
}

///// After this only thing you have to do is merge this returned array with your $rules array.
//// Usage example: $rules = array_merge($rules, get_jsfields($input,"date_",6,"required|date"));