BuddyPress.org

You can use the get_post_type() function. For example:

if ( get_post_type( $post_id ) === 'post' ) {
    // This is a "post" post
} else {
    // This isn't a "post" post
}

It’s also helpful to know the default post type names:

• post
• page
• attachment
• revision
• nav_menu_item