It’s come from another post format I made in my tumblog theme. I’ve add a custom meta box in post editor to easily deal with the post format. Firstly, there’s a text input for audio URL and a textarea for SoundCloud embed code. I thought that’s not an effective way to solve this problem. I want just a text input for both audio URL or SoundCloud URL.

I looking for another way more effective and found built-in WordPress function, wp_oembed_get(). But I realized that the built-in library in WordPress doesn’t support SoundCloud oEmbed yet. Here the function wp_oembed_add_provider() works.

// Register oEmbed support for Soundcloud
wp_oembed_add_provider( 'http://soundcloud.com/*', 'http://soundcloud.com/oembed' );

The first argument, http://soundcloud.com/* is the URL structure that this (SoundCloud) oEmbed provider supports. The second, http://soundcloud.com/oembed is the base URL of the oEmbed provider. Actually there’s third argument, regex, but we doesn’t need it this time.

Here is the example of post custom meta data:

// Get the URL from custom field
$audio = get_post_meta($post->ID, 'daoon_audio', true);

// Echo the embedded sound
if ($audio)
    echo wp_oembed_get($audio);

And lastly, we just paste the SoundCloud track URL to the meta box and it automatically embedded. One thing I didn’t find the way is how we add a parameter to the embedded URL without entering it directly in the box. There’s an array argument after the URL at wp_oembed_get(), but I tried and it doesn’t work. Anyone knows, please leave at comment, thanks.

Useful Links

1. WordPress Embeds
2. Function Reference: wp oembed get()
3. Function Reference: wp oembed add provider()
4. Function Reference: wp_embed_register_handler(), registering non-oEmbed support