Use preffered way to pass nullable items

Author: tvdijen

src/XML/xenc/EncryptedData.php

@@ -13,6 +13,8 @@
 use SimpleSAML\XMLSecurity\XML\xenc\CipherData;
 use SimpleSAML\XMLSecurity\XML\xenc\EncryptionMethod;
 
+use function array_pop;
+
 /**
  * Class containing encrypted data.
  *
@@ -73,8 +75,8 @@ final public static function fromXML(DOMElement $xml): static
             self::getOptionalAttribute($xml, 'Type', null),
             self::getOptionalAttribute($xml, 'MimeType', null),
             self::getOptionalAttribute($xml, 'Encoding', null),
-            count($encryptionMethod) === 1 ? $encryptionMethod[0] : null,
-            count($keyInfo) === 1 ? $keyInfo[0] : null,
+            array_pop($encryptionMethod[0]),
+            array_pop($keyInfo[0]),
         );
     }
 }