fix php8 warnings, fixes #1679

Closes #1679

Merge request studip/studip!1084

1 files changed, 8 insertions, 9 deletions

diff --git a/lib/classes/LinkButton.class.php b/lib/classes/LinkButton.class.php
index 6d60da8..f203841 100644
--- a/lib/classes/LinkButton.class.php
+++ b/lib/classes/LinkButton.class.php
@@ -36,17 +36,16 @@ class LinkButton extends Interactable
     public function __toString()
     {
         // add "button" to attribute @class
-        $this->attributes['class'] .= ' button';
-
-        $attributes = [];
-        ksort($this->attributes);
-        foreach ($this->attributes as $k => $v) {
-            $attributes[] = sprintf(' %s="%s"', $k, htmlReady($v));
+        if (!isset($this->attributes['class'])) {
+            $this->attributes['class'] = '';
         }
+        $this->attributes['class'] .= ' button';
 
         // TODO: URLHelper...?!
-        return sprintf('<a%s>%s</a>',
-                       join('', $attributes),
-                       htmlReady($this->label));
+        return sprintf(
+            '<a %s>%s</a>',
+            arrayToHtmlAttributes($this->attributes),
+            htmlReady($this->label)
+        );
     }
 }