Google analytics 3.x php8.1 compatibility

google_analytics_explode-php81-3261502-2.patch

diff --git a/google_analytics.module b/google_analytics.module
index 0182a5d..83184ff 100644
--- a/google_analytics.module
+++ b/google_analytics.module
@@ -270,7 +270,7 @@ function google_analytics_page_attachments(array &$page) {
     // Per RFC 2109, cookie domains must contain at least one dot other than the
     // first. For hosts such as 'localhost' or IP Addresses we don't set a
     // cookie domain.
-    if ($domain_mode == 1 && count(explode('.', $cookie_domain)) > 2 && !is_numeric(str_replace('.', '', $cookie_domain))) {
+    if ($domain_mode == 1 && count(explode('.', $cookie_domain ?? '')) > 2 && !is_numeric(str_replace('.', '', $cookie_domain))) {
       $arguments = array_merge($arguments, ['cookie_domain' => $cookie_domain]);
       $googleanalytics_adsense_script .= 'window.google_analytics_domain_name = ' . Json::encode($cookie_domain) . ';';
     }
diff --git a/src/Form/GoogleAnalyticsAdminSettingsForm.php b/src/Form/GoogleAnalyticsAdminSettingsForm.php
index 2ab6e17..467e78c 100644
--- a/src/Form/GoogleAnalyticsAdminSettingsForm.php
+++ b/src/Form/GoogleAnalyticsAdminSettingsForm.php
@@ -110,7 +110,7 @@ class GoogleAnalyticsAdminSettingsForm extends ConfigFormBase {
     global $cookie_domain;
     $multiple_sub_domains = [];
     foreach (['www', 'app', 'shop'] as $subdomain) {
-      if (count(explode('.', $cookie_domain)) > 2 && !is_numeric(str_replace('.', '', $cookie_domain))) {
+      if (count(explode('.', $cookie_domain ?? '')) > 2 && !is_numeric(str_replace('.', '', $cookie_domain))) {
         $multiple_sub_domains[] = $subdomain . $cookie_domain;
       }
       // IP addresses or localhost.
@@ -123,7 +123,7 @@ class GoogleAnalyticsAdminSettingsForm extends ConfigFormBase {
     foreach (['.com', '.net', '.org'] as $tldomain) {
       $host = $_SERVER['HTTP_HOST'];
       $domain = substr($host, 0, strrpos($host, '.'));
-      if (count(explode('.', $host)) > 2 && !is_numeric(str_replace('.', '', $host))) {
+      if (count(explode('.', $host ?? '')) > 2 && !is_numeric(str_replace('.', '', $host))) {
         $multiple_toplevel_domains[] = $domain . $tldomain;
       }
       // IP addresses or localhost.
@@ -884,7 +884,7 @@ class GoogleAnalyticsAdminSettingsForm extends ConfigFormBase {
   protected static function extractParameterValues($string) {
     $values = [];
 
-    $list = explode("\n", $string);
+    $list = explode("\n", $string ?? '');
     $list = array_map('trim', $list);
     $list = array_filter($list, 'strlen');
 
diff --git a/tests/src/Functional/GoogleAnalyticsBasicTest.php b/tests/src/Functional/GoogleAnalyticsBasicTest.php
index 3e1de41..d6c96f4 100644
--- a/tests/src/Functional/GoogleAnalyticsBasicTest.php
+++ b/tests/src/Functional/GoogleAnalyticsBasicTest.php
@@ -273,7 +273,7 @@ class GoogleAnalyticsBasicTest extends BrowserTestBase {
     // TODO: Workaround to run tests successfully. This feature cannot tested
     // reliable.
     global $cookie_domain;
-    if (count(explode('.', $cookie_domain)) > 2 && !is_numeric(str_replace('.', '', $cookie_domain))) {
+    if (count(explode('.', $cookie_domain ?? '')) > 2 && !is_numeric(str_replace('.', '', $cookie_domain))) {
       $this->assertRaw('"cookie_domain":"' . $cookie_domain . '"');
     }
     else {