Using wp list pluck to extract data from a WP Query Object
Often times, you’ll need to run a WP_Query, but don’t actually need the whole object it returns. Perhaps just the post id’s are all you want.
Previously, I’d take the object, then use a foreach to loop through it, building the array of id’s that I need.
But I’ve just discovered wp_list_pluck which makes this way simpler:
$latest = new WP_Query( array ( 'post_type' => array('post'), 'posts_per_page' => 3 )); $post_ids = wp_list_pluck( $latest->posts, 'ID' );
….and that’s it. $post_ids will now be an array of ids.
Array (  => 8473  => 5152  => 1343 )
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