Question

当我遇到此错误时，我正在处理论坛脚本

注意：未定义的变量：userids in 第19行的C：\ xampp \ htdocs \ myfolder \ discussion \ post_reply_parse.php “字段列表”中的未知列“电子邮件”

请帮帮我。这是代码

<?php
session_start(); 
if ($_SESSION['uid']) {
    if (isset($_POST['reply_submit'])) {
        include_once("connect.php");
        $creator = $_SESSION['uid'];
        $cid = $_POST['cid'];
        $tid = $_POST['tid'];
        $reply_content = $_POST['reply_content'];
        $sql = "INSERT INTO posts (category_id, topic_id, post_creator, post_content, post_date) VALUES ('".$cid."', '".$tid."', '".$creator."', '".$reply_content."', now())";
        $res = mysql_query($sql) or die(mysql_error());
        $sql2 = "UPDATE categories SET last_post_date=now(), last_user_posted='".$creator."' WHERE id='".$cid."' LIMIT 1";
        $res2 = mysql_query($sql2) or die(mysql_error());
        $sql3 = "UPDATE topics SET topic_reply_date=now(), topic_last_user='".$creator."' WHERE id='".$tid."' LIMIT 1";
        $res3 = mysql_query($sql3) or die(mysql_error());
        $sql4 = "SELECT post_creator FROM posts WHERE category_id='".$cid."' AND topic_id='".$tid."' GROUP BY post_creator";
        $res4 = mysql_query($sql4) or die(mysql_error());
        while ($row4 = mysql_fetch_assoc($res4)) {
            $userids[] .= $row4['post_creator'];
        }
        foreach ($userids as $key) {
            $sql5 = "SELECT id, email FROM users WHERE id='".$key."' AND forum_notification='1' LIMIT 1";
            $res5 = mysql_query($sql5) or die(mysql_error());
            if (mysql_num_rows($res5) > 0) {
                $row5 = mysql_fetch_assoc($res5);
                if ($row5['id'] != $creator) {
                    $email .= $row5['email'].", ";
                }
            }
        }
        $email = substr($email, 0, (strlen($email) - 2));
        $to = "noreply@somewhere.com";
        $from = "YOUR_SITE_EMAIL_HERE";
        $bcc = $email;
        $subject = "YOUR_SUBJECT_HERE";
        $message = "YOU MESSAGE CONTENT HERE";

        $headers = "From: $from\r\nReply-To: $from";
        $headers .= "\r\nBcc: {$bcc}";
        mail($to, $subject, $message, $headers);

        if (($res) && ($res2) && ($res3)) {
            echo "<p>Your reply has been successfully posted. <a href='view_topic.php?cid=".$cid."&tid=".$tid."'>Click here to return to the topic.</a></p>";
        } else {
            echo "<p>There was a problem posting your reply. Try again later.</p>";
        }

    } else {
        exit();
    }
} else {
    exit();
}
?>

Answer 1

查看users表的结构，并确保为包含电子邮件地址的列使用正确的名称。之后，删除行上的句号

$userids[] .= $row4['post_creator'];

......所以它变成了：

$userids[] = $row4['post_creator'];

如何解决mysql中的未知列错误

1 个答案: