php - 如何进行查询以获取特定的帖子 ID？

Question

已关闭。此问题不符合 Stack Overflow guidelines 。目前不接受答案。

---

有关您编写的代码问题的问题必须在问题本身中描述具体问题 - 并包含有效代码以重现该问题。请参阅SSCCE.org寻求指导。

已关闭 9 年前。

Improve this question

hai 我正在尝试使用 php 和 mysql 制作一个评论系统(没有 jquery 或 ajax)问题是如何找到用户评论的帖子的ID，我使用了一个while循环，它发布到到目前为止我在这里的所有帖子......

//user data is set
if (isset($_POST['comment'])) {
    //variables to post in database
    $comment = $_POST['comment'];
    $com_from = $_SESSION['user'];
    $com_to = $_GET['u'];
    $com_time = date("Y-m-d H:i:s");
    $u = $_GET['u'];

    //query to get the id of the post in the `post` table
    $que = mysql_query("SELECT * FROM posts WHERE `post_to` = '$u'");
    if ($que) {
        //loop through all the posts ad get all ID
        while ($ro = mysql_fetch_array($que)) {
            $pst_id = $ro['post_id'];
            //query inside the while loop for getting the post ID i think here is the problem
            if (!empty($_POST['comment'])) {
                $com_query = mysql_query("INSERT INTO comments SELECT '','$comment',`post_id`,'$com_from','$com_to','$com_time' FROM `posts` WHERE `posts`.`post_id` = $pst_id");
            }
        }
    }
}

Answer 1

首先，您不必经历查询帖子表的循环。如果您正在评论特定帖子，请以隐藏类型的 html 形式传递其 ID。

// here 1 is id of post
<input type="hidden" name="postid" value="1">

然后你可以编写插入查询，如下所示:

if (isset($_POST['comment'])) {
    //variables to post in database
    $comment = $_POST['comment'];
    $com_from = $_SESSION['user'];
    // $com_to is post id and i believe comment table contain field to store post id
    $com_to = $_POST['postid'];
    $com_time = date("Y-m-d H:i:s");
$que = mysql_query("INSERT INTO comments VALUES('$comment','$com_to','$com_from','$com_time')");
}