Disable the WordPress new user email notification sent to the site admin

disable-wordpress-admin-new-user-notification.php

<?php
//Disable the new user notification sent to the site admin
function smartwp_disable_new_user_notifications() {
	//Remove original use created emails
	remove_action( 'register_new_user', 'wp_send_new_user_notifications' );
	remove_action( 'edit_user_created_user', 'wp_send_new_user_notifications', 10, 2 );
	
	//Add new function to take over email creation
	add_action( 'register_new_user', 'smartwp_send_new_user_notifications' );
	add_action( 'edit_user_created_user', 'smartwp_send_new_user_notifications', 10, 2 );
}
function smartwp_send_new_user_notifications( $user_id, $notify = 'user' ) {
	if ( empty($notify) || $notify == 'admin' ) {
	  return;
	}elseif( $notify == 'both' ){
    	//Only send the new user their email, not the admin
		$notify = 'user';
	}
	wp_send_new_user_notifications( $user_id, $notify );
}
add_action( 'init', 'smartwp_disable_new_user_notifications' );