asdsad

modules/boersenchecker/src/Support/HomePage.php

@@ -341,8 +341,8 @@ final class HomePage
             return null;
         }
 
-        $from = strtoupper(trim($from)) ?: $this->defaultReportCurrency;
-        $to = strtoupper(trim($to)) ?: $this->defaultReportCurrency;
+        $from = $this->normalizeCurrency($from, $this->defaultReportCurrency);
+        $to = $this->normalizeCurrency($to, $this->defaultReportCurrency);
         if ($from === $to) {
             return $amount;
         }
@@ -355,4 +355,10 @@ final class HomePage
             return null;
         }
     }
+
+    private function normalizeCurrency(?string $value, string $fallback = 'EUR'): string
+    {
+        $normalized = strtoupper(trim((string) $value));
+        return $normalized !== '' ? $normalized : $fallback;
+    }
 }