I currently have a custom meta field for adding a video url to the post. I'd like for the existing taxonomy term "video" to be automatically assigned to the post upon saving if the meta field has any value.

1 Answer 1


You should hook onto the save_post action.

add_action( 'save_post', 'add_video_taxonomy' );

function add_video_taxonomy( $post_id ) {

    // you should check if the current user can do this, probably against publish_posts
    // you should also have a nonce check here as well

    if( get_post_meta( $post_id, 'video_url', true ) ) {
        wp_set_post_terms( $post_id, 'video', 'your_custom_taxonomy_name', true );

  • Thanks! This worked well. I didn't mention this above but in case anyone else needs it I had to use 'wp_set_object_terms' instead since the post in question is a custom post type.
    – rspny
    Commented Dec 13, 2013 at 21:49

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