Update XML2Array.php

fix the mistake of createArray's return data type to advoid warnings

Author: kuangjy2

LSS/XML2Array.php

@@ -64,7 +64,7 @@ public static function init($version = '1.0', $encoding = 'UTF-8', $format_outpu
      * @param string $node_name - name of the root node to be converted
      * @param int - Bitwise OR of the libxml option constants see @link http://php.net/manual/zh/libxml.constants.php
      * @param array $arr - aray to be converterd
-     * @return DOMDocument
+     * @return array
      */
     public static function &createArray($input_xml, $options = 0) {
         $xml = self::getXMLRoot();