执行脚本后，值不会自动存储在数据库中

Question

这是显示fb样式的php代码/ like，在手动插入数据库之后可以正常工作..但我想在执行脚本后自动插入数据库并将其存储在数据库中

include('db.php');
if($_REQUEST['postId'])
{
    $userip = $_SERVER['REMOTE_ADDR'];

    mysql_query("update likes set likes=likes+1 where post_id= ".$_REQUEST['postId']);

    mysql_query("INSERT INTO ip (userip,post_id) VALUES('".$userip."','".$_REQUEST['postId']."')");

    $total_likes = mysql_query("SELECT * FROM facebook_collapsed_likes where post_id = ".$_REQUEST['postId']." ");
    $likes = mysql_fetch_array($total_likes);
    $likes = $likes['likes'];
}
echo $likes;