Question

我的脚本只会从sql数据库中打印一行。我想显示具有名字和姓氏的多行。这是一个朋友列表。代码如下。

谢谢你，红色。

<?php
             $q = "SELECT * FROM `friendslist` WHERE `id1` = '{$_SESSION['id']}' OR `id2` = '{$_SESSION['id']}' AND `confirmed` = '1'";

$res = mysqli_query($db, $q) or die("<h1>4:)Fatal Error! Please contact administration.</h1>".mysql_error());

    while($friends = mysqli_fetch_array($res)){

    if($_SESSION['id']==$friends['id1']){

    $q = "SELECT * FROM `clientusers` WHERE `id` = '{$friends['id2']}' ORDER BY `id` ASC";
    $res = mysqli_query($db, $q);
    while($list = mysqli_fetch_array($res)){?>

        <li class="chat__human">
            <img class="chat__avatar" src="https://robohash.org/joe" alt="" />
            <span class="chat__name"><?php print($list['firstname']);?> &nbsp;<?php print($list['lastname']);?></span>
        </li>

    <?}

    }if($_SESSION['id']==$friends['id2']){

    $q = "SELECT * FROM `clientusers` WHERE `id` = '{$friends['id1']}' ORDER BY `id` ASC";
    $res = mysqli_query($db, $q);


    while($list = mysqli_fetch_array($res)){?>

            <li class="chat__human">
            <img class="chat__avatar" src="https://robohash.org/joe" alt="" />
            <span class="chat__name"><?php print($list['firstname']);?>&nbsp;<?php print($list['lastname']);?></span>
        </li>

    <?}
    }
        }



       ?>

Answer 1

我认为问题在于变量＆＃34; $ res＆＃34;在下面的陈述中

while($friends = mysqli_fetch_array($res)){

被以下声明覆盖

 $q = "SELECT * FROM `clientusers` WHERE `id` = '{$friends['id2']}' ORDER BY `id` ASC";
    $res = mysqli_query($db, $q);

因此，当外部while循环返回以获取第二个记录时，它将显示一个新结果。因此，尝试命名资源变量$ res1和$ res2以避免混淆。

所以代码看起来像

$res1 = mysqli_query($db, $q) or die("<h1>4:)Fatal Error! Please contact administration.</h1>".mysql_error());
while($friends = mysqli_fetch_array($res1)){
....
....
....
$res2 = mysqli_query($db, $q);
while($list = mysqli_fetch_array($res2)){?>

PHP While循环不会显示多行

1 个答案: