验证代码：
validate(['file'=>[
'fileSize' => 40 * 1024 * 1024,
'fileExt' => 'xls,xlsx',
'fileMime' => ['application/vnd.ms-excel', 'application/vnd.openxm
]])->check(['file' => $file]);
最佳答案
验证代码：
validate(['file'=>[
'fileSize' => 40 * 1024 * 1024,
'fileExt' => 'xls,xlsx',
'fileMime' => ['application/vnd.ms-excel', 'application/vnd.openxm
]])->check(['file' => $file]);