wp-includes/post.php:3276Un-sticks a post.
$post_idintOne hook fires while unstick_post() runs, in this order:
Fires once a post has been removed from the sticky list.
function unstick_post( $post_id ) { $post_id = (int) $post_id; $stickies = get_option( 'sticky_posts' ); if ( ! is_array( $stickies ) ) { return; } $stickies = array_values( array_unique( array_map( 'intval', $stickies ) ) ); if ( ! in_array( $post_id, $stickies, true ) ) { return; } $offset = array_search( $post_id, $stickies, true ); if ( false === $offset ) { return; } array_splice( $stickies, $offset, 1 ); $updated = update_option( 'sticky_posts', $stickies ); if ( $updated ) { /** * Fires once a post has been removed from the sticky list. * * @since 4.6.0 * * @param int $post_id ID of the post that was unstuck. */ do_action( 'post_unstuck', $post_id ); }}Introduced in 2.7.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/post.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.