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YouTube iframe API and WordPress

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半阙折子戏
半阙折子戏 2020-12-19 13:14

I\'m trying the following code on WordPress post page:
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  • 我寻月下人不归
    2020-12-19 13:23

    This kind of code injection is better done with a Shortcode. Instead of document.createElement, just use wp_enqueue_script to load the Iframe API and the rest of the script is printed by the shortcode. PHP heredoc makes easy to build large configurable HTML strings.

    Shortcode usage inside the post/page would be: [ytplayer id="M7lc1UVf-VE"]

    add_shortcode( 'ytplayer', 'print_yt_player' );

function print_yt_player( $atts ) {
    wp_enqueue_script( 'yt-iframe', 'https://www.youtube.com/iframe_api' );
    $yt_id = $atts['id'];
    $html = <<<HTML
        <div id="player"></div>   
        <script>
            var player, done = false;
            function onYouTubeIframeAPIReady() {
                player = new YT.Player('player', {
                    height: '390',
                    width: '640',
                    videoId: '$yt_id',
                    playerVars: { 'autoplay': 1, 'controls': 0 },
                    events: {
                        'onReady': onPlayerReady,
                        'onStateChange': onPlayerStateChange
                    }
                });
            }    
            function onPlayerReady(event) {
                event.target.playVideo();
            }
            function onPlayerStateChange(event) {
                if (event.data == YT.PlayerState.PLAYING && !done) {
                    setTimeout(stopVideo, 6000);
                    done = true;
                }
            }
            function playVideo() {
                player.playVideo();
            }
            function pauseVideo() {
                player.pauseVideo();
            }
            function stopVideo() {
                player.stopVideo();
            }
            function loadVideoById(val) {
                player.loadVideoById(val, 0, "large");
            }
        </script>
HTML;
    return $html;
}
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  • 陌清茗
    2020-12-19 13:28

    Most likely, <p> tags are being inserted when the page/post is saved. Two options:

    1. Disable wpautop

    2. Include the script compressed (on a single line), like this: 

      <div id="player"></div>
<script>var tag=document.createElement("script");tag.src="https://www.youtube.com/iframe_api";var firstScriptTag=document.getElementsByTagName("script")[0];firstScriptTag.parentNode.insertBefore(tag,firstScriptTag);var player;function onYouTubeIframeAPIReady(){player=new YT.Player("player",{height:"390",width:"640",videoId:"M7lc1UVf-VE",playerVars:{autoplay:1,controls:0},events:{onReady:onPlayerReady,onStateChange:onPlayerStateChange}})}function onPlayerReady(a){a.target.playVideo()}var done=!1;function onPlayerStateChange(a){a.data!=YT.PlayerState.PLAYING||done||(setTimeout(stopVideo,6E3),done=!0)}function playVideo(){player.playVideo()}function pauseVideo(){player.pauseVideo()}function stopVideo(){player.stopVideo()}function loadVideoById(a){player.loadVideoById(a,0,"large")};</script>`
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