Email to admin when WordPress lost password is requested

lostpassword_post.php

<?php
  /* Email to admin when WordPress lost password is requested */
	add_action( 'lostpassword_post', 'my_lostpassword_post', 10, 2 );
	function my_lostpassword_post( $errors, $user_data ) {
		if ( ! empty( $_SERVER['HTTP_CLIENT_IP'] ) ) {
			//check ip from share internet
			$ip = $_SERVER['HTTP_CLIENT_IP'];
		} elseif ( ! empty( $_SERVER['HTTP_X_FORWARDED_FOR'] ) ) {
			//to check ip is pass from proxy
			$ip = $_SERVER['HTTP_X_FORWARDED_FOR'];
		} else {
			$ip = $_SERVER['REMOTE_ADDR'];
		}
		wp_mail(
			get_option( 'admin_email' ),
			'Someone tried to retrieve the password for '.$_POST['user_login'].' - '.date_i18n( 'Y-m-d H:i:s)' ),
			'IP: '.$ip
		);
	}