use dash as cookie separator to save on encoding characters

Author: dannyvankooten

src/collect-functions.php

@@ -240,7 +240,7 @@ function determine_uniqueness(string $type, $thing): array
 
 function determine_uniqueness_cookie(string $type, $thing): array
 {
-    $things = isset($_COOKIE['_koko_analytics_pages_viewed']) ? \explode(',', $_COOKIE['_koko_analytics_pages_viewed']) : [];
+    $things = isset($_COOKIE['_koko_analytics_pages_viewed']) ? \explode('-', $_COOKIE['_koko_analytics_pages_viewed']) : [];
     $unique_type = $type && !in_array($type[0], $things);
     $unique_thing =  $unique_type ? true : !in_array($thing, $things);
 
@@ -250,7 +250,7 @@ function determine_uniqueness_cookie(string $type, $thing): array
 
     if ($unique_type || $unique_thing) {
         $things[] = $thing;
-        \setcookie('_koko_analytics_pages_viewed', \join(',', $things), (new DateTimeImmutable('tomorrow, midnight', get_site_timezone()))->getTimestamp(), '/', "", false, true);
+        \setcookie('_koko_analytics_pages_viewed', \join('-', $things), (new DateTimeImmutable('tomorrow, midnight', get_site_timezone()))->getTimestamp(), '/', "", false, true);
     }
 
     return [$unique_type, $unique_thing];