February 12, 2011 
Definition:
function wp_publish_post($post_id) {}
Publish a post by transitioning the post status.
Parameters
- int $post_id: Post ID.
Defined actions
- edit_post
do_action('edit_post', $post_id, $post); - save_post
do_action('save_post', $post_id, $post); - wp_insert_post
do_action('wp_insert_post', $post_id, $post);
Source code
function wp_publish_post($post_id) {
global $wpdb;
$post = get_post($post_id);
if ( empty($post) )
return;
if ( 'publish' == $post->post_status )
return;
$wpdb->update( $wpdb->posts, array( 'post_status' => 'publish' ), array( 'ID' => $post_id ) );
$old_status = $post->post_status;
$post->post_status = 'publish';
wp_transition_post_status('publish', $old_status, $post);
do_action('edit_post', $post_id, $post);
do_action('save_post', $post_id, $post);
do_action('wp_insert_post', $post_id, $post);
}
4009
A HitchHackers guide through WordPress 
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