How does PHP add some fields to an HTML form?

Some special needs can only be used in PHP (in PHP files) to put some data into the HTML form of hidden fields.

How to do?
Thank you

Reply content:

Some special needs can only be used in PHP (in PHP files) to put some data into the HTML form of hidden fields.

How to do?
Thank you

Just modify in PHP, that is, the HTML template can not be modified, then there is a question, where you put the value of the HTML.
So the HTML or JS is to be modified AH.
Or you can use Ajax asynchronous loading to implement it.
Just modify PHP, then you can only include the HTML code in the PHP file.

With a hidden, you should be able to

Add type= "hidden" to the field of HTML you want to hide

The PHP file is the main code of the HTML code

< code="">

纯php代码的

 ';?>

拼接要隐藏的html的字段呀，加type="hidden"

