Question

我目前正在开发友谊系统。要接受朋友，我需要获取friendship_id值。

根据电子邮件（来自会话）我可以从特定的friendshiprequest获取大量信息，例如姓氏，姓名，照片，ID号码......

我可以用这种方式打印每个友谊的信息。所以我有FRIENDSHIP ID值显示为信息，但现在我想在一个函数中使用它。

$friendrequests=$friendship->GetAllFriendRequests($email);

<?php
    foreach ($friendrequests as $request) {
    echo "
        <div><p>
            <a href='profile.php?user_id=".$request['friendship_applicant_id'] . "'>
                <img src='uploads/" . $request['friendship_applicant_avatar']  . " " . " ' alt='' />" . $request['friendship_applicant_surname'] . $request['friendship_id'] . " " . $request['friendship_applicant_name'] . "
            </a> has send you a friend request" . "

            <form action='" . $_SERVER['REQUEST_URI'] . "' method='post'>
                <button type='submit' name=''>Accept</button>
                <button type='submit' name=''>Decline</button>
            </form>
        </p></div>";   
}
                    ?>

所以我尝试使用以下代码获取特定数字，但它表示friendship_id的未定义索引：$friendrequestnumber = $friendrequests['friendship_id'];

这是GetAllFriendRequests函数的代码。我可以使用此代码，还是应该以完全不同的方式执行此操作？

public function GetAllFriendRequests($email) {
    $db = new Db();

    $select = "SELECT * FROM friendship WHERE friendship_recipient = '" . $email . "' AND friendship_status = 'pending' ORDER BY friendship_id DESC";

    $result = $db -> conn -> query($select);

    $result_array=array();
    while ($row = mysqli_fetch_array($result)) {
         $result_array[]=$row;                                                                                          
    }
    return $result_array;

}

使用var_dump我得到2个请求的信息：

Array ( [0] => Array ( [0] => 84 [friendship_id] => 84 [1] => ron@hot.com [friendship_applicant] => ron@hot.com [2] => 29 [friendship_applicant_id] => 29 [3] => ron [friendship_applicant_name] => ron [4] => ron [friendship_applicant_surname] => ron [5] => 1394134610fuckyou.jpg [friendship_applicant_avatar] => 1394134610fuckyou.jpg [6] => jan@hot.com [friendship_recipient] => jan@hot.com [7] => 1 [friendship_recipient_id] => 1 [8] => Vandenbergh [friendship_recipient_name] => Vandenbergh [9] => Jan [friendship_recipient_surname] => Jan [10] => 1394041001fuckyou.jpg [friendship_recipient_avatar] => 1394041001fuckyou.jpg [11] => Pending [friendship_status] => Pending [12] => 0000-00-00 00:00:00 [friendship_time] => 0000-00-00 00:00:00 ) [1] => Array ( [0] => 78 [friendship_id] => 78 [1] => Bert@hot.com [friendship_applicant] => Bert@hot.com [2] => 2 [friendship_applicant_id] => 2 [3] => Van Damme [friendship_applicant_name] => Van Damme [4] => Bert [friendship_applicant_surname] => Bert [5] => sdfds.png [friendship_applicant_avatar] => sdfds.png [6] => Jan@hot.com [friendship_recipient] => Jan@hot.com [7] => 1 [friendship_recipient_id] => 1 [8] => Vandenbergh [friendship_recipient_name] => Vandenbergh [9] => Jan [friendship_recipient_surname] => Jan [10] => 1394041001fuckyou.jpg [friendship_recipient_avatar] => 1394041001fuckyou.jpg [11] => Pending [friendship_status] => Pending [12] => 0000-00-00 00:00:00 [friendship_time] => 0000-00-00 00:00:00 ) )

现在他正在更新，但同时我在我的函数AcceptFriendRequest中的这一行得到一个错误（致命错误：调用非对象上的成员函数fetch_assoc（））：

'the return $data=$result->fetch_assoc();'

public function AcceptFriendRequest($requestnumber){ $db = new Db(); 
$select = "UPDATE friendship SET friendship_status = 'Accepted' WHERE 
friendship_id ='" . $requestnumber . "'"; $result = $db->conn->query($select); 
return $data=$result->fetch_assoc(); }

Answer 1

GetAllFriendRequests函数

您返回的数组的结构是问题所在。而不是

while ($row = mysqli_fetch_array($result)) {
    $result_array[]=$row;
}

做：

while ($row = mysqli_fetch_array($result, MYSQLI_ASSOC)) {
    $result_array[]=$row;
}

另外，仅供参考，你在GetAllFriendRequests函数中不需要这一行：

$result_array=array();

因为此行中的括号（在while循环内）使其自动成为一个数组：

 $result_array[]=$row;

主要PHP文件

您的主PHP文件中的表单也需要更改。这打印出所有相关数据，但我改变了一些 - 提交按钮现在都有一个名称，因此它们将出现在POST数组中。此外，还有一个隐藏的输入，您需要运行AcceptFriendRequest函数才能使用friendship_id。如果他们单击Accept，则（1）将数据POST回到同一文件并刷新页面，（2）if（isset）条件检查他们是否已接受请求。（3）它使用我们存储在隐藏输入中的friendship_id调用AcceptFriendRequest函数。页面上的每个表单都会有一个隐藏的输入。如果您需要来自特定请求的更多变量，则可能需要其他隐藏输入 - 例如，如果您需要其他数据来运行Decline函数。

<?php
foreach ($friendrequests as $request) {
echo "
    <div><p>
        <a href='profile.php?user_id=".$request['friendship_applicant_id'] . "'>
            <img src='uploads/" . $request['friendship_applicant_avatar']  . " " . " ' alt='' />" . $request['friendship_applicant_surname'] . $request['friendship_id'] . " " . $request['friendship_applicant_name'] . "
        </a> has send you a friend request" . "

        <form action='" . $_SERVER['REQUEST_URI'] . "' method='post'>
            <button type='submit' name='Accept'>Accept</button>
            <button type='submit' name='Decline'>Decline</button>
            <input type='hidden' name='acceptID' value='".$request['friendship_id']."' />
        </form>
    </p></div>";   
}//foreach

if (isset($_POST['Accept'])){
    $accepted = AcceptFriendRequest($_POST['acceptid']);
    //for debugging, you may want to uncomment this and watch what your function returns
    //echo $accepted;
}

if (isset($_POST['Decline'])){
    //some other function is the request is declined
}

?>

获得id值

1 个答案: