The wp_insert_post action fires once a post has been saved. You have the ability to set it to only fire on new posts or on all save actions using the parameters. Please see Plugin_API/Action_Reference/save_post for more information. Keep in mind that this action is called both for actions in the admin as well as anytime the wp_insert_post() function is invoked.
This action can be replicated by creating a conditional in a save_post action that excludes certain post statuses.
An important distinction of wp_insert_post action is that it is fired after update_post_meta has been called.
Below is a basic example that will send an email every time a post or page is created or updated on your website. (copied from codex)
function my_project_updated_send_email( $post_id, $post, $update ) {
// If this is a revision, don't send the email.
if ( wp_is_post_revision( $post_id ) )
return;
$post_url = get_permalink( $post_id );
$subject = 'A post has been updated';
$message = "A post has been updated on your website:\n\n";
$message .= $post->post_title . ": " . $post_url;
// Send email to admin.
wp_mail( 'admin@example.com', $subject, $message );
}
add_action( 'wp_insert_post', 'my_project_updated_send_email', 10, 3 );
Below is a basic example that will send an email every time a post or page is created or updated on your website. (copied from codex)
It’s not reliable to check first publication.
$updatewill betruein first time post is published if you are using dashboard because it creates revisions.