Anonymaze IP Address

Hi.

I am trying to anonymize the user IP address that is saved by CF7 and Flamingo.

From the CF7 DOCUMENTATION it seems enough to use the wpcf7_remote_ip_addr filter associated with the wpcf7_anonymize_ip_addr function by inserting the following code in the functions.php file:

add_filter ('wpcf7_remote_ip_addr', 'wpcf7_anonymize_ip_addr');

But this doesn’t work!

I also made an alternative function:

if ( function_exists( 'wpcf7_anonymize_ip_addr' ) ) {
    function custom_anonymize_ip_addr($ip_addr) {
	    $anonymizeIP = 'xxx.xxx.xxx.xxx';
	    if ( !empty($ip_addr) ) {
		    $pieces = explode('.', $ip_addr);
		    $anonymizeIP = $pieces[0] .'.'. $pieces[1] .'.xxx.xxx';
	    }

        return $anonymizeIP;
    }
    add_filter('wpcf7_remote_ip_addr', 'custom_anonymize_ip_addr', 10, 1);
}

but it looks like the wpcf7_remote_ip_addr filter doesn’t exist…

Other solutions to anonymize the user’s IP?