在Wordpress帖子中捕获Youtube视频并插入自定义字段值

Question

Could anyone help me out, I need to scan the post for a youtube video. If the post contains a video (www.youtube.com/embed/youtubepostid) then I'd like to copy that url into a custom field with the key "iFrame".

I'm going round in circles looking for an answer and whenever I try soething I get up with the WSD :(

Any pointers in the right direction?

Answer 1

I have coded something to solve our common problem ;) I have added something too if you to display your formatted embed video whatever you want (out of the post content).

I - Add these functions to your 'functions.php' file

1- Remove the youtube embed from content

function remove_video( $content ) {
    $postOutput = preg_replace('/<iframe[^>]+./','', $content);
    return $postOutput;
}
add_filter( 'the_content', 'remove_video', 100 );

2 - Catch and return the youtube embed from content

function catch_first_youtube_video() {
    global $post, $posts;
    // Catch youtube iframe src
    preg_match_all('/(http|https).*(yout).*/i', $post->post_content, $matches);
    $youtubeUrl = $matches[0][0];

    // Set the new meta for your post.
    add_post_meta($post->ID, 'iFrame',  $youtubeUrl)  

    // Remove http: or https:
    $formated = preg_replace('/(http:|https:|watch\\?v=)/i','', $youtubeUrl);

    // Formated string '//youtube.com/embed/XXXXXXX'
    $formated =str_replace('youtube.com/','youtube.com/embed/', $formated );

    return '<iframe src="'.$formated .'"></iframe>';
}

II - Call those functions in your post template content

1 - Show the post's content in your post template without the embed video

remove_filter(the_content(),'remove_video', 100 );

2 - Show the embed video iframe whatever you want to !

<?= catch_first_youtube_video(); ?>

And voilà ! Enjoy ! (Sorry for my bad english)