Issue #3152852 by lamp5, Neslee Canil Pinto: Wrong filter "active" for boolean...

Issue #3152852 by lamp5, Neslee Canil Pinto: Wrong filter "active" for boolean field - regression D7

includes/better_exposed_filters.theme.inc

@@ -215,7 +215,7 @@ function template_preprocess_bef_links(array &$variables) {
     // with the entire options array and remove items from it as needed.
     $urlOptions = $url->getOptions();
 
-    if (isset($gelement['#multiple'])) {
+    if (isset($element['#multiple']) && $element['#multiple']) {
       $newQuery = isset($existing_query[$name]) ? $existing_query[$name] : [];
       if (in_array($optionValue, $selectedValues)) {
         // Allow users to toggle an option using the same link.
@@ -234,7 +234,7 @@ function template_preprocess_bef_links(array &$variables) {
       }
     }
     else {
-      if ($optionValue == $element['#value']) {
+      if (strval($optionValue) === $element['#value']) {
         // Allow toggle link functionality -- click the same link to turn an
         // option on or off.
         $newQuery = $existing_query;
@@ -270,7 +270,10 @@ function template_preprocess_bef_links(array &$variables) {
       '#url' => $url,
     ];
 
-    if (in_array($optionValue, $selectedValues)) {
+    /*
+     * @see https://stackoverflow.com/questions/13846769/php-in-array-0-value
+     */
+    if (in_array(strval($optionValue), $selectedValues)) {
       $variables['links'][$optionValue]['#attributes']['class'][] = 'bef-link--selected';
     }
   }