public function getLikedNumByUID($UID)
{
$likea = new likeA();
$answer = new answer();
$AIDS = $answer->getAIDsbyUID($UID);
$sum = 0;
for ($i = 0; $i < count($AIDS); $i++) {
$sum += $likea->getLikenumbyAID($AIDS[$i]);
}
return $sum;
}