Deactivate GDPR WordPress plugin for non EU IP addresses

deactivate-gdpr-plugin-for-non-eu-ip-addressess.php

<?php

/**
 * To have a list of two letter country codes of the european countries
 * 
 * @var string[]
 */
const EUROPEAN_ALPHA_TWO_COUNTRY_CODES = [
    "IE",
    "GB",
    "PT",
    "ES",
    "FR",
    "IT",
    "MT",
    "GR",
    "BG",
    "RO",
    "HU",
    "HR",
    "SI",
    "AT",
    "SK",
    "CZ",
    "PL",
    "DE",
    "LU",
    "BE",
    "NL",
    "DK",
    "SE",
    "FI",
    "EE",
    "LV",
    "LT",
    "IC",
    "MQ",
    "RE",
    "GF",
    "CY"
];

/**
 * To obtain the client's IPv4 IP address
 * 
 * @return string
 */
function get_client_ip_address() {
    $ipAddress = '';

    if ( $_SERVER['HTTP_CLIENT_IP'] ) {
        $ipAddress = $_SERVER['HTTP_CLIENT_IP'];
    } else if ( $_SERVER['HTTP_X_FORWARDED_FOR'] ) {
        $ipAddress = $_SERVER['HTTP_X_FORWARDED_FOR'];
    } else if ( $_SERVER['HTTP_X_FORWARDED'] ) {
        $ipAddress = $_SERVER['HTTP_X_FORWARDED'];
    } else if ( $_SERVER['HTTP_FORWARDED_FOR'] ) {
        $ipAddress = $_SERVER['HTTP_FORWARDED_FOR'];
    } else if ( $_SERVER['HTTP_FORWARDED'] ) {
        $ipAddress = $_SERVER['HTTP_FORWARDED'];
    } else if ( $_SERVER['REMOTE_ADDR'] ) {
        $ipAddress = $_SERVER['REMOTE_ADDR'];
    } else {
        $ipAddress = 'UNKNOWN';
    }

    return $ipAddress;
}

/**
 * To remove GDPR plugin from the list of the active plugins
 * 
 * @param string[] $plugins
 *
 * @return string[]
 */
function virtually_deactivate_gdpr_plugin( $plugins ) {
    if ( in_array( 'gdpr/gdpr.php', $plugins ) ) {
        unset( $plugins[ array_search( 'gdpr/gdpr.php', $plugins ) ] );
    }

    return array_values( $plugins );
}

// first get the client's ip address
$clientIp = get_client_ip_address();

// skip the process if the IP is unavailable or not valid
if( ! filter_var($clientIp, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4) ) {
    return;
}

// get the two letter country code of the client by passing it's ip to a free webservice
$result = \Requests::get( 'https://ipinfo.io/' . $clientIp . '/country' );
$response = trim( $result->body );

// skip the process if the client is not in a european country
if ( in_array( $response, EUROPEAN_ALPHA_TWO_COUNTRY_CODES ) ) {
    return;
}

// finally virtually deactivate the gdpr plugin
\add_filter( 'option_active_plugins', 'virtually_deactivate_gdpr_plugin' );