回帖：$validator = Validator::make($request->all(), [
'fchmessage' => 'required|string|min:2|max:100',
],['fchmessage.min'=>'内容长度必须大于2个字符','fchmessage.max'=>'内容长度必须小于100个字符']);
if ($validator->fails()) {
//print_r($validator->errors()->all());
return response()->json(['code'=>0,'msg'=>implode(' ',$validator->errors()->all())]);
}