Função para criar usuário a partir de um custom post publicado

create_user_by_post_published.php

/**
 * Create user by Perfil is published or updated.
 *
 * @param int $post_id The post ID.
 * @param post $post The post object.
 * @param bool $update Whether this is an existing post being updated or not.
 */
function perfil_save_create_user( $post_id, $post, $update ) {

    $post_type = get_post_type( $post_id );

    if ( 'perfil' != $post_type ) return;

    $slug = $post->post_name;
    $title = $post->post_title;
    $email_address = get_post_meta( $post_id, 'email', true );

    if ( null == username_exists( $slug ) && !empty( $email_address ) ) {

		// Generate the password and create the user
		$password = wp_generate_password( 12, false );
		$user_id = wp_create_user( $slug, $password, $email_address );

		// Set fields of the user
		wp_update_user(
			array(
			  'ID'          	=> $user_id,
			  'first_name'		=> $title,
			  'nickname'	    => $title,
			  'display_name'	=> $title
			)
		);

		// Set the role
		$user = new WP_User( $user_id );
		$user->set_role( 'perfil' );

		// Email the user
		//wp_mail( $email_address, 'Welcome!', 'Your Password: ' . $password );

		// Set the ID of owner this Perfil
	    update_post_meta( $post_id, 'user_owner', $user_id );

	    // Set author of Perfil
	    $arg = array(
		    'ID' => $post_id,
		    'post_author' => $user_id,
		);
		wp_update_post( $arg );

	}
        
}
add_action( 'save_post', 'perfil_save_create_user', 10, 3 );