Как записать данные в кеш?

$sql_result = $db->query("SELECT * FROM ".PREFIX."_category WHERE ca_adress != '' ORDER BY id ASC");

$get_coor = $homepage = file_get_contents('https://geocode-maps.yandex.ru/1.x/?apikey=ключ&format=json&geocode=' . urlencode( $row['ca_adress'] ) . '&results=1');
	$decode_coor = json_decode( $get_coor, true );
		$coord = $decode_coor['response']['GeoObjectCollection']['featureMember'][0]['GeoObject']['Point']['pos'];
		$coord_de = explode(' ', $coord);
		$coord = "{$coord_de[1]}, {$coord_de[0]}";