Question

我正在尝试制作一个类似下面的代码，但是我需要它才能获取数据一次，因为我的代码下面不止一次，我担心它会减慢服务器的速度。是否有更好的方法来做同样的下面一个。基本上下面的代码会将数据库中的列表放入自己的div类别中。

<div class="popular-video">
<h2>Popular</h2>
    <ul>
    <?php 

        global $connection;
        $sexy = "sexy";
        $query = "SELECT `videoname`,`username`,`videourl`,`uploaddate`,`duration`,`views`,`tags` FROM `videolist` WHERE `tags` = ? ";
        $stmt = $connection->prepare($query);
        $stmt->bind_param("s",$sexy);
        $stmt->execute();
        $stmt->store_result();

        if($stmt->num_rows > 0){
            $stmt->bind_result($videoname,$username,$videourl,$uploaddate,$duration,$views,$tags);
            while ($stmt->fetch()) {
                if($username == 'ichigo'){
                echo "
                        <a href='video.php?watch=$videourl'>
                        <li>
                            <div class='leftside'>
                                <img src='' width='100%' height='100%' style='background-color: blue;' >                    
                            </div>

                            <div class='rightside'>
                                <h4>$videoname</h4>
                                <p>$username</p>
                                <p>$views views</p>
                                <p>$duration</p>                    
                            </div>

                        </li>
                        </a>
                ";                      
                }

            }
        }
    ?>
    </ul>
</div>

<div class="subcription-video">
<h2>Subcription</h2>
    <ul>
    <?php
        global $connection;
        $sexy = "sexy";
        $query = "SELECT `videoname`,`username`,`videourl`,`uploaddate`,`duration`,`views` FROM `videolist` WHERE `tags` = ? ";
        $stmt = $connection->prepare($query);
        $stmt->bind_param("s",$sexy);
        $stmt->execute();
        $stmt->store_result();
        if($stmt->num_rows > 0){
            $stmt->bind_result($videoname,$username,$videourl,$uploaddate,$duration,$views);
            while ($stmt->fetch()) {
                echo "
                        <a href='video.php?watch=$videourl'>
                        <li>
                            <div class='leftside'>
                                <img src='' width='100%' height='100%' style='background-color: blue;' >                    
                            </div>

                            <div class='rightside'>
                                <h4>$videoname</h4>
                                <p>$username</p>
                                <p>$views views</p>
                                <p>$duration</p>                    
                            </div>

                        </li>
                        </a>
                ";
            }
        }
    ?>
    </ul>
</div>

<div class="related-video-by-subcription">
<h2>Related-Video</h2>
    <ul>
    <?php
        global $connection;
        $sexy = "sexy";
        $query = "SELECT `videoname`,`username`,`videourl`,`uploaddate`,`duration`,`views` FROM `videolist` WHERE `tags` = ? ";
        $stmt = $connection->prepare($query);
        $stmt->bind_param("s",$sexy);
        $stmt->execute();
        $stmt->store_result();
        if($stmt->num_rows > 0){
            $stmt->bind_result($videoname,$username,$videourl,$uploaddate,$duration,$views);
            while ($stmt->fetch()) {
                echo "
                        <a href='video.php?watch=$videourl'>
                        <li>
                            <div class='leftside'>
                                <img src='' width='100%' height='100%' style='background-color: blue;' >                    
                            </div>

                            <div class='rightside'>
                                <h4>$videoname</h4>
                                <p>$username</p>
                                <p>$views views</p>
                                <p>$duration</p>                    
                            </div>

                        </li>
                        </a>
                ";
            }
        }
    ?>
    </ul>
</div>

Answer 1

您可以创建一个函数并在HTML中调用该函数。

package com.example.hellomoon;

import android.content.Context;
import android.media.MediaPlayer;

public class AudioPlayer {

private MediaPlayer mMediaPlayer;

public void stop() {
    if (mMediaPlayer != null) {
        mMediaPlayer.release();
        mMediaPlayer = null;
    }
}

public void play(Context c, int rid) {
    stop();

    mMediaPlayer = MediaPlayer.create(c, rid);
    mMediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
        @Override
        public void onCompletion(MediaPlayer mediaPlayer) {
            stop();
        }
    });

    mMediaPlayer.start();
}

}

然后只需调用您想要的功能。

function foo() {
    global $connection;
    $sexy = "sexy";
    $query = "SELECT `videoname`,`username`,`videourl`,`uploaddate`,`duration`,`views` FROM `videolist` WHERE `tags` = ? ";

    $stmt = $connection->prepare($query);
    $stmt->bind_param("s",$sexy);
    $stmt->execute();
    $stmt->store_result();

    if($stmt->num_rows > 0) {
        $stmt->bind_result($videoname, $username, $videourl, $uploaddate, $duration, $views);
        while ($stmt->fetch()) {
            echo "<a href='video.php?watch=$videourl'>
                    <li>
                        <div class='leftside'>
                            <img src='' width='100%' height='100%' style='background-color: blue;' >                    
                        </div>

                        <div class='rightside'>
                            <h4>$videoname</h4>
                            <p>$username</p>
                            <p>$views views</p>
                            <p>$duration</p>                    
                        </div>
                    </li>
                  </a>";
         }
    }
}

Answer 2

您应该将业务逻辑与表示逻辑分开。

您可以调用 $ stmt-＆gt; fetch_all（）并将结果保存在变量中，然后在循环中使用此变量。

这种方法有更好的方法吗？

2 个答案: