1 files changed, 5 insertions, 5 deletions
diff --git a/library/Reporting/Web/Widget/HeaderOrFooter.php b/library/Reporting/Web/Widget/HeaderOrFooter.php
index dcb37e7..3ec9a7f 100644
--- a/library/Reporting/Web/Widget/HeaderOrFooter.php
+++ b/library/Reporting/Web/Widget/HeaderOrFooter.php
@@ -10,9 +10,9 @@ class HeaderOrFooter extends HtmlDocument
 {
     use Macros;
 
-    const HEADER = 'header';
+    public const HEADER = 'header';
 
-    const FOOTER = 'footer';
+    public const FOOTER = 'footer';
 
     protected $type;
 
@@ -64,9 +64,9 @@ class HeaderOrFooter extends HtmlDocument
 
     protected function createColumn(array $data, $key)
     {
-        $typeKey = "${key}_type";
-        $valueKey = "${key}_value";
-        $type = isset($data[$typeKey]) ? $data[$typeKey] : null;
+        $typeKey = "{$key}_type";
+        $valueKey = "{$key}_value";
+        $type = $data[$typeKey] ?? null;
 
         switch ($type) {
             case 'text':