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I have an AJAX request that returns a post. The post_content has links to Twitter, YouTube, TED and other platforms that are registered as oEmbed providers in a default, vanilla WordPress install. By now, the WordPress oEmbed handler does not register them and displays plain links and nothing else.

How can I fetch content via AJAX with oEmbed support?

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Actually this was quite easy – when you know what's missing: The current post ID for the global $wp_embed object, so it knows what to refer to. The reason is simple: oEmbeds get cached as post meta data, so without knowing the ID, the MarkUp can't get fetched and replaced in the content.

// grab a post from the database

/** @var \WP_Embed $wp_embed */
global $wp_embed;

/** @var \WP_Post $post; */
// Add the fetched posts ID and add it to the global object
$wp_embed->post_ID = $post->ID;

// Execute the [embed] shortcode
$wp_embed->run_shortcode( $post->post_content );

// Execute the oEmbed handlers for plain links on the own line
$wp_embed->autoembed( $post->post_content );

That's it.

More in depth info about oEmbed and caching can be found in a related answer by @birgire.

  • yes I thought too it would be more involved, before digging through similar stuff here ;-) – birgire Sep 15 '15 at 0:14
  • I think it is better to use $wp_embed->autoembed( $post->post_content );, isn't it @kaiser? – cybmeta Sep 15 '15 at 8:57
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    @cybmeta Actually you need both. They have a different purpose (plain links and [embed] shortcode). – kaiser Sep 15 '15 at 12:10
  • I forgot about [embed], I never use it. – cybmeta Sep 15 '15 at 12:38
  • @birgire Updated with a link to your answer. – kaiser Nov 4 '15 at 9:00

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