How to develop a simple online video player using PHP

How to use PHP to develop a simple online video player

With the rapid development of the Internet, the use of videos has become an indispensable part of people's daily lives . Therefore, developing a simple online video player has become a need for many website developers. In this article, we will introduce how to use PHP language to develop a simple online video player, allowing you to implement the video playback function on your website.

First of all, we need to clarify the function to be implemented. A basic online video player should have the following core functions:

1. Play video: be able to load specified video files and play them on the web page;
2. Video control : Ability to control video playback, pause, fast forward, rewind and other operations;
3. Video list: Able to display multiple video files and switch to play different videos;
4. Full screen playback: Allows videos to be played in full-screen mode;
5. Responsive layout: can adapt to screen sizes on different devices to ensure that the video player interface displays normally.

Next, we will implement the above functions through specific code examples.

1. Play Video
   First, we need to specify the path of a video file. This path can be a relative path or an absolute path, set according to your actual needs.

<video src="video/file.mp4" controls></video>

In the above code snippet, we use the HTML5 video tag to implement video playback. Among them, the src attribute specifies the path of the video file, and the control attribute (controls) is used to display the player's control panel.

2. Video Control
   In order to realize the video control function, we can operate it through JavaScript. The specific code is as follows:

var video = document.querySelector('video');  // 获取视频元素

// 对视频元素添加事件监听，实现相应的功能
video.addEventListener('play', function() {
  console.log('开始播放');
});

video.addEventListener('pause', function() {
  console.log('暂停播放');
});

video.addEventListener('seeked', function() {
  console.log('视频跳转');
});

// 控制视频播放
function playVideo() {
  video.play();
}

// 控制视频暂停
function pauseVideo() {
  video.pause();
}

// 控制视频快进
function forwardVideo() {
  video.currentTime += 10;
}

// 控制视频后退
function backwardVideo() {
  video.currentTime -= 10;
}

The above code implements the video playback, pause, fast forward and rewind functions. Add listening events through addEventListener to implement corresponding operations.

3. Video list
   In order to realize the function of video list, we can use PHP to dynamically generate a video list and switch to different videos by clicking on the list item. The specific code is as follows:

$videos = [
  'video1' => 'video/video1.mp4',
  'video2' => 'video/video2.mp4',
  'video3' => 'video/video3.mp4'
];

foreach ($videos as $name => $path) {
  echo '<li><a href="?video=' . urlencode($path) . '">' . $name . '</a></li>';
}

// 播放选中的视频
if (isset($_GET['video'])) {
  $video = $_GET['video'];
  echo '<video src="' . $video . '" controls></video>';
}

In the above code, $videos is a video list array that stores the video name and its path information. Use a foreach loop to dynamically generate HTML code for the video list. When the user clicks on the list item, the path of the video file will be passed through the URL parameter, the video path will be obtained through GET, and the video tag will be used to play the video.

4. Full screen playback
   In order to realize the full screen playback function, we can use the full screen API to achieve it. The specific code is as follows:

var video = document.querySelector('video');

function requestFullscreen() {
  if (video.requestFullscreen) {
    video.requestFullscreen();
  } else if (video.mozRequestFullScreen) {
    video.mozRequestFullScreen();
  } else if (video.webkitRequestFullScreen) {
    video.webkitRequestFullScreen();
  } else if (video.msRequestFullScreen) {
    video.msRequestFullScreen();
  }
}

In the above code, the requestFullscreen() function is used to request full-screen mode. By determining the support of different browsers for the full-screen API, the corresponding method is called.

5. Responsive layout
   In order to allow the video player to adapt to the screen size on different devices, we can use CSS responsive layout. The specific code is as follows:

.video-container {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
}

.video-container video {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

In the above code, the video-container class is used to define the style of the video container, and the vertical ratio of the container is set through the padding-bottom attribute to achieve responsive layout.

With the above code example, we can quickly implement a simple online video player. Of course, this is just a basic version. If you want to achieve more functions, you can further optimize and expand it. I hope this article can be helpful to you, and I wish you success in implementing your online video player!

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