邮件内容解析 附件扩展名bug

@@ -59,6 +59,7 @@ class Attachment {
                     $item = str_replace("\t"," ",$item);
                     list($t,$e) = explode(' ',$item,2);
                     $e = trim($e);
+                    $e = explode(' ',$e)[0];
                     if($e){
                         $this->extension = $e;
                         return $e;