Advanced Power of PHP

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Please explain in more detail how to reproduce this issue or provide us a link to your website, where we can check this.

It's impossible. You may write your own convert of date into the number or simply use a datetime format field

What exactly the error you see?

The issue that your SET ... is empty.
You have to define prefixes for each DataGrid and properly define them:
viewtopic.php?f=33&t=1441

You may also check online demo:
https://www.apphp.com/php-datagrid/exam ... 4_code.php

Check you inserted the code without any formatting or tags.
It it doesn't help - contact our support.

Here the valid format for such kind of fields is Edit Mode: 'FieldName_9' =>array('header'=>'Name_I', 'type'=>'money', 'req_type'=>'rn', 'width'=>'80px', 'title'=>'', 'readonly'=>'false', 'maxlength'=>'-1', 'default'=>'', 'unique'=>'false', 'unique_condition'=>'', 'visible'=>'true', 'on_js_event'=>'...

Unfortunately such feature is not possible in current version. You may develop your own question type and implement it.