PHP mysqli 表查询给出了我想针对另一个表查询的多个结果

Question

我一直在开发一个社交网络，我有一个粉丝页面表，用户可以为他们最喜欢的乐队或名人创建个人资料，还有一个名为朋友的表，他们可以订阅粉丝页面。然后，我希望请求出现在粉丝页面管理员的通知中，以除外。 在第一个 sql 查询之后，它返回具有多个值的粉丝页面，但是如果我回显下一个 $sql 查询，它表明它只选择一个结果来查询而不是全部。

所以基本上我需要查询用户登录的所有粉丝页面（$log_username）的粉丝页面表，然后我需要获取这些粉丝页面并查询朋友表以了解是否有人请求订阅用户的粉丝页面??

感谢您的帮助迈克尔

    <?php
$fanpage_requests = '';

$fansql = "SELECT created_by, fanpage_name FROM `fanpages`  WHERE created_by = '$log_username' ";
$fanquery = mysqli_query($db_conx, $fansql);
$fannumrows = mysqli_num_rows($fanquery);

if($fannumrows < 1){
    $fanpage_requests = 'No friend requests';
} else {

    while($row = mysqli_fetch_array($fanquery, MYSQLI_ASSOC)) {
        $fanpage_name = $row["fanpage_name"];
        $created_by = $row["created_by"];

        $fansubSql = "SELECT * FROM friends WHERE user2='$fanpage_name' AND accepted='0' ORDER BY datemade ASC";
        $fansubQuery = mysqli_query($db_conx, $fansubSql);
        $fansubNumrows = mysqli_num_rows($fansubQuery);
        //print_r ($fansubNumrows);     
        if($fansubNumrows < 1){
            $fanpage_requests = "blah blah"; 
        }
        print_r ($fansubNumrows);
        while ($fansubRow = mysqli_fetch_array($fansubQuery, MYSQLI_ASSOC)) {
            $fansubreqID = $fansubRow["id"];
            $fansubuser1 = $fansubRow["user1"];
            $fansubdatemade = $fansubRow["datemade"];
            $fansubdatemade = strftime("%B %d", strtotime($fansubdatemade));

            $fansubthumbquery = mysqli_query($db_conx, "SELECT avatar FROM users WHERE username='$fansubuser1' LIMIT 1");
            $fansubthumbrow = mysqli_fetch_row($fansubthumbquery);
            $fansubuser1avatar = $fansubthumbrow[0];
            $fansubuser1pic = '<img src="user/'.$fansubuser1.'/'.$fansubuser1avatar.'" alt="'.$fansubuser1.'" class="user_pic">';

            if($fansubuser1avatar == NULL){
                $fansubuser1pic = '<img src="images/avatardefault.jpg" alt="'.$fansubuser1.'" class="user_pic">';
            }

            $fanpage_requests .= '<div id="friendreq_'.$fansubreqID.'" class="friendrequests">';
            $fanpage_requests .= '<a href="user.php?u='.$fansubuser1.'">'.$fansubuser1pic.'</a>';
            $fanpage_requests .= '<div class="user_info" id="user_info_'.$fansubreqID.'">'.$fansubdatemade.' <a href="user.php?u='.$fansubuser1.'">'.$fansubuser1.'</a> requests friendship<br /><br />';
            $fanpage_requests .= '<button onclick="fanReqHandler(\'accept\',\''.$fansubreqID.'\',\''.$fansubuser1.'\',\'user_info_'.$fansubreqID.'\')">accept</button> or ';
            $fanpage_requests .= '<button onclick="fanReqHandler(\'reject\',\''.$fansubreqID.'\',\''.$fansubuser1.'\',\'user_info_'.$fansubreqID.'\')">reject</button>';
            $fanpage_requests .= '</div>';
            $fanpage_requests .= '</div>';
        }
    }
}
?>

print_r 输出现在是 001110，我得到 blah blah

Answer 1

好的，所以确定您需要稍后关闭循环，它不能正常工作的原因是因为现在您在不同的循环中使用相同的变量，所以值被覆盖（例如$query）。

您需要根据需要不同的所有变量清楚地区分循环：

<?php
    $friend_requests = '';

    $sql = "SELECT created_by, fanpage_name FROM `fanpages`  WHERE created_by = '$log_username' ";
    $query = mysqli_query($db_conx, $sql);
    $numrows = mysqli_num_rows($query);

    if($numrows < 1){
        $friend_requests = 'No friend requests';
    } else {

        while($row = mysqli_fetch_array($query, MYSQLI_ASSOC)) {
            $fanpage_name = $row["fanpage_name"];
            $created_by = $row["created_by"];

            $friendsSql = "SELECT * FROM friends WHERE user2='$fanpage_name' AND accepted='0' ORDER BY datemade ASC";
            $friendsQuery = mysqli_query($db_conx, $friendsSql);
            $friendsNumrows = mysqli_num_rows($friendsQuery);
            $fanpage_requests = "$friendsSql";

            if($friendsNumrows < 1){
                $fanpage_requests = "$fanpage_name"; **//this shows that only 1 query is being queried in this second sql statement**
            }

            while ($friendsRow = mysqli_fetch_array($friendsQuery, MYSQLI_ASSOC)) {
                $reqID = $friendsRow["id"];
                $user1 = $friendsRow["user1"];
                $datemade = $friendsRow["datemade"];
                $datemade = strftime("%B %d", strtotime($datemade));

                $thumbquery = mysqli_query($db_conx, "SELECT avatar FROM users WHERE username='$user1' LIMIT 1");
                $thumbrow = mysqli_fetch_row($thumbquery);
                $user1avatar = $thumbrow[0];
                $user1pic = '<img src="user/'.$user1.'/'.$user1avatar.'" alt="'.$user1.'" class="user_pic">';

                if($user1avatar == NULL){
                    $user1pic = '<img src="images/avatardefault.jpg" alt="'.$user1.'" class="user_pic">';
                }

                $fanpage_requests .= '<div id="friendreq_'.$reqID.'" class="friendrequests">';
                $fanpage_requests .= '<a href="user.php?u='.$user1.'">'.$user1pic.'</a>';
                $fanpage_requests .= '<div class="user_info" id="user_info_'.$reqID.'">'.$datemade.' <a href="user.php?u='.$user1.'">'.$user1.'</a> requests friendship<br /><br />';
                $fanpage_requests .= '<button onclick="fanReqHandler(\'accept\',\''.$reqID.'\',\''.$user1.'\',\'user_info_'.$reqID.'\')">accept</button> or ';
                $fanpage_requests .= '<button onclick="fanReqHandler(\'reject\',\''.$reqID.'\',\''.$user1.'\',\'user_info_'.$reqID.'\')">reject</button>';
                $fanpage_requests .= '</div>';
                $fanpage_requests .= '</div>';
            }
        }
    }
?>