Question

我正在用PHP创建一个Web服务。我想加载几个数据，比如说 10 记录。

因此，当它出现在移动应用中时，应显示第一个 10 记录，然后如果用户向下滚动，则应再次显示 10 记录。

<?php

$limit = 10; // limit of 10 records

$userQuery="SELECT * FROM (SELECT * FROM `agenda` WHERE agenda_event_id=$event_id 
                     LIMIT $limit ) AS R1
                     INNER JOIN `bookmeeting` ON R1.agenda_id=bookmeeting.event_id";

$result=mysqli_query($conn,$userQuery);

$number=mysqli_num_rows($result);

while($row=mysqli_fetch_assoc($result)){
    $getdata['data'][] = $row;
}

以上是我的代码。

我缺少哪里？

Answer 1

请使用以下代码，您需要为每个请求设置$ page值。



//Need to set this variable when you send request to get next 10 records, default value would be 1
$page=1;
$offset = 10;
$limit = ($page - 1) * 10;

$userQuery="SELECT * FROM (SELECT * FROM `agenda` WHERE agenda_event_id= $event_id LIMIT $limit ) AS R1 INNER JOIN `bookmeeting` ON R1.agenda_id=bookmeeting.event_id";

if($page > 0)
    $userQuery .= " limit $limit, $offset";

    $result=mysqli_query($conn,$userQuery);

    $number=mysqli_num_rows($result);

    while($row=mysqli_fetch_assoc($result)){
        $getdata['data'][] = $row;
    }

//Need to set this variable when you send request to get next 10 records, default value would be 1 $page=1; $offset = 10; $limit = ($page - 1) * 10; $userQuery="SELECT * FROM (SELECT * FROM `agenda` WHERE agenda_event_id= $event_id LIMIT $limit ) AS R1 INNER JOIN `bookmeeting` ON R1.agenda_id=bookmeeting.event_id"; if($page > 0) $userQuery .= " limit $limit, $offset"; $result=mysqli_query($conn,$userQuery); $number=mysqli_num_rows($result); while($row=mysqli_fetch_assoc($result)){ $getdata['data'][] = $row; }

PHP Web服务：在滚动时从数据库加载数据

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