framework/RedKiteCms/Tools/JsonTools.php
public static function join($json1, $json2)
    {
        return array_merge(self::jsonDecode($json1), self::jsonDecode($json2));
    }
public static function join($json1, $json2)
    {
        return array_merge(self::jsonDecode($json1), self::jsonDecode($json2));
    }
Joins two json contents

@param string|array $json1
@param string|array $json2

@return array