Improve the regex

Co-authored-by: Martin Auswöger <martin@auswoeger.com>
contao · Dec 10, 2020 · 48a0c3c · 48a0c3c
1 parent 52e85cd
commit 48a0c3c
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/core-bundle/src/Resources/contao/dca/tl_page.php b/core-bundle/src/Resources/contao/dca/tl_page.php
@@ -1289,9 +1289,9 @@ public function checkDns($varValue)
 
 		// The first part will match IPv6 addresses in square brackets. The
 		// second part will match domain names and IPv4 addresses.
-		preg_match('#(?:^(?:[a-z]+]://)?(\[[0-9a-f:]+]))|(?:^(?:[a-z]+://)?([\pN\pL._-]*))#ui', $varValue, $matches);
+		preg_match('#^(?:[a-z]+://)?(\[[0-9a-f:]+]|[\pN\pL._-]*)#ui', $varValue, $matches);
 
-		return Idna::encode($matches[2] ?? $matches[1]);
+		return Idna::encode($matches[1]);
 	}
 
 	/**