如何利用PHP开发一个简单的在线视频播放器

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

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;
}

$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>';
}

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();
  }
}

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

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