$json_string = file_get_contents("http://api.wunderground.com/api/7ec5f6510a4656df/geolookup/forecast/q/40121.json");
$parsed_json = json_decode($json_string, true);
$parsed_json = $parsed_json['forecast']['txt_forecast']['forecastday'];
//pr($parsed_json);
foreach($parsed_json as $key => $value)
{
echo $value['period'] . '<br>';
echo $value['icon'] . '<br>';
// etc
}