Question

我有以下查询/输出，没有显示任何/工作。所有列表名都是正确的。我有php错误检查，它没有抛出任何错误。

这是没有输出任何内容的代码。

$total_members_query = $con->prepare("SELECT COUNT(id)FROM users WHERE `group` IN (2,3,4,5)")
    or die ("Total Members query failed: %s\n".($total_members_query->error));
    $total_members_query->execute();
    $total_members_query->bind_result($total_members);
    $numrows_members = $total_members_query->num_rows();
//  $numrows_members = mysqli_num_rows($total_members_query);
    if($numrows_members > 0){

    while($members_row = mysqli_fetch_assoc($total_members_query)){
        //$members_total = $members_row['id'];
?>
                            <div class="member_summary_statistics">
                                <div class="member_summary_category_title">League Statistics</div>
        <div id="member_summary_member_count">Members in your league: <?php echo $total_members; } } ?></div>

这是更多代码。它上面和下面。

<div class="member_summary_user_birthdays">
                            <div class="member_summary_category_title">Today&#39;s Birthdays</div>
                        </div>
<?php
$total_members_query = $con->prepare("SELECT COUNT(id)FROM users WHERE `group` IN (2,3,4,5)")
        or die ("Total Members query failed: %s\n".($total_members_query->error));
        $total_members_query->execute();
        $total_members_query->bind_result($total_members);
        $numrows_members = $total_members_query->num_rows();
    //  $numrows_members = mysqli_num_rows($total_members_query);
        if($numrows_members > 0){

        while($members_row = mysqli_fetch_assoc($total_members_query)){
            //$members_total = $members_row['id'];
?>
                            <div class="member_summary_statistics">
                                <div class="member_summary_category_title">League Statistics</div>
        <div id="member_summary_member_count">Members in your league: <?php echo $total_members; } } ?></div>
                                    <div id="member_summary_newest_member">Welcome our newest member - <?php echo $member_username;?>!</div>

＆amp;之后的这一行中的所有内容在我的文件管理器中，符号显示为灰色而不是黑色和蓝色。

Today&#39;s Birthdays</div>

然后我的两个标题在生日文字后没有出现..

class="member_summary_category_title">League Statistics</div>
        <div id="member_summary_member_count">Members in your league:

我不知道是否有任何因素影响到了正在发生的事情，因为我一遍又一遍地看着这一点并且无法解决任何问题。

我很感激任何帮助。

Answer 1

您似乎在准备声明中错过COUNT(id)和FROM之间的空格。

编辑：您还需要缓冲结果集，请参阅Mysqli documentation：

$total_members_query->execute();
$total_members_query->bind_result($total_members);
$total_members_query->store_result();
$numrows_members = $total_members_query->num_rows;

编辑2：仔细看看你的陈述，我意识到你的查询将总是返回一行（因为COUNT将至少为0），为什么你可能想要采取这样的方法：

<?php
$total_members_query = $con->prepare("SELECT COUNT(id) as countId FROM users WHERE `group` IN (2,3,4,5)")
    or die ("Total Members query failed: \n" . ($total_members_query->error));
    $total_members_query->execute();
    $total_members_query->bind_result($total_members);
    $total_members_query->fetch();
    if($total_members > 0){
    ?>
    HTML-code...

查询输出未显示在页面上

1 个答案: