@ -61,7 +61,7 @@ function str2arr($str, $glue = ',')
* @return string
* @author 麦当苗儿 <zuojiazi@vip.qq.com>
*/
function arr2str($arr, $glue = ',')
function arr2str($arr=[], $glue = ',')
{
return implode($glue, $arr);
}