PHP study notes: music player and video platform

PHP Study Notes: Music Player and Video Platform

Introduction:
In today’s digital age, music and videos have become important for people’s entertainment and information dissemination. Way. As a web developer, learning how to build music players and video platforms is an essential part. This article will introduce how to use PHP language to build a simple music player and video platform, and give specific code examples.

1. Music Player
   1.1 File Upload and Storage
   First, we need to implement the function for users to upload music files. In PHP, we can use the <input type="file"> tag and the move_uploaded_file() function to implement file upload and move operations. The following is a simple file upload example:

<?php
if(isset($_POST['submit'])){
  $target_dir = "uploads/";
  $target_file = $target_dir . basename($_FILES["fileToUpload"]["name"]);
  move_uploaded_file($_FILES["fileToUpload"]["tmp_name"], $target_file);
  echo "文件上传成功！";
}
?>

<form action="" method="post" enctype="multipart/form-data">
  选择音乐文件：
  <input type="file" name="fileToUpload" id="fileToUpload">
  <input type="submit" value="上传" name="submit">
</form>

In the above code, we first check whether the user clicked the submit button, then move the uploaded file to the specified directory, and finally display that the upload was successful news.

1.2 Player interface and music list
Next, we need to create a player interface that displays the music list and provides play and pause functions. We can use HTML and CSS to create a simple player interface and use PHP to get the list of music files from the server side. The following is a simple sample code:

<?php
$music_dir = "uploads/";
$music_files = glob($music_dir . "*.mp3");

foreach($music_files as $file) {
  echo basename($file) . "<br>";
}
?>

<audio id="audioPlayer" controls>
  <source src="" type="audio/mpeg">
  您的浏览器不支持音频播放。
</audio>

<script>
var audioPlayer = document.getElementById("audioPlayer");

function playMusic(file) {
  audioPlayer.src = "uploads/" + file;
  audioPlayer.play();
}
</script>

In the above code, we first use the glob() function to get the list of music files on the server, and then use foreach Loop through each file name. In the player section, we created a <audio> tag and used JavaScript to control the playback of the music.

1.3 Database and song information
In addition to storing music files, we also need to store music-related information, such as song title, singer, album, etc. In order to achieve this function, we can use a MySQL database to store music information, and use PHP to connect to the database and perform corresponding operations.

The following is a simple database connection example:

<?php
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "music";

$conn = new mysqli($servername, $username, $password, $dbname);

if ($conn->connect_error) {
  die("连接失败: " . $conn->connect_error);
}

$sql = "SELECT * FROM songs";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
  while($row = $result->fetch_assoc()) {
    echo $row["song_name"] . " - " . $row["artist"] . "<br>";
  }
} else {
  echo "没有歌曲数据。";
}

$conn->close();
?>

In the above code, we first use the new mysqli() function to connect to the database, and then execute a query, Display the song title and artist name of each song.

2. Video platform
   2.1 Video upload and playback
   Similar to the music player, we first need to implement the function for users to upload video files and provide a video player to play the uploaded video . The following is a sample code:

<?php
if(isset($_POST['submit'])){
  $target_dir = "uploads/videos/";
  $target_file = $target_dir . basename($_FILES["fileToUpload"]["name"]);
  move_uploaded_file($_FILES["fileToUpload"]["tmp_name"], $target_file);
  echo "文件上传成功！";
}
?>

<form action="" method="post" enctype="multipart/form-data">
  选择视频文件：
  <input type="file" name="fileToUpload" id="fileToUpload">
  <input type="submit" value="上传" name="submit">
</form>

<video width="320" height="240" controls>
  <source src="" type="video/mp4">
  您的浏览器不支持视频播放。
</video>

In the above code, we first implement the upload function of video files, and then use the <video> tag to play the uploaded video.

2.2 Video list and search function
Similar to the music player, we also need to provide a video list and support the user's ability to search for videos by keywords. The following is a simple sample code:

<?php
$video_dir = "uploads/videos/";
$video_files = glob($video_dir . "*.mp4");

foreach($video_files as $file) {
  echo basename($file) . "<br>";
}
?>

<form action="" method="get">
  <input type="text" name="keyword">
  <input type="submit" value="搜索">
</form>

<?php
if(isset($_GET['keyword'])){
  $keyword = $_GET['keyword'];

  foreach($video_files as $file) {
    if(strpos(basename($file), $keyword) !== false) {
      echo basename($file) . "<br>";
    }
  }
}
?>

In the above code, we first use the glob() function to get the list of video files on the server and display each file name. In the search part, we use a simple <form></form> form to receive the keywords entered by the user, and use the strpos() function to determine whether the file name contains the keyword, Matching video file names are then displayed.

Conclusion:
By learning how to build a simple music player and video platform, we have mastered the basic application of PHP language in music and video application development. I hope this article will be helpful to beginners and inspire more developers to be interested in learning and researching music and video applications. Of course, this is just the beginning of learning PHP. We can further improve and expand these applications by learning other technologies such as HTML5, CSS3, JavaScript, etc.

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