Passing extra data in $_POST vars

I need to pass an id along with a form field e.g

<input name="__field_name" value="123开发者_开发问答4" />

this only passes the name and value as a key => value pair. i need to keep the name (dynamically entered by the user) and value intact for later use, but i also need to pass an ID along with this var.

how can i do this cleanly? i was thinking putting it in the name and doing a regex to seperate it e.g.

__field_name__ID  

although this seems messy...

points to consider:

• there are allot of post variables that are generated by the CMS (wordpress) that i wont use
• name must be retained in original format along with value

Why not submit the data as an array?

Instead of calling your field __field_name__id or some mess, use the facilities PHP provides: Call your input field field_name[id] and when the form is posted back to the server, PHP's $_POST array will have a sub-array called field_name which contains the key=>value mappings you'd mentioned.

If you have two such fields you want to tie together, use the following:

<input type="text" name="myFields[id]" />
<input type="text" name="myFields[name]" />

And on postback, PHP will provide you with a $_POST['myFields']['id'] and $_POST['myFields']['name'].

You could add a hidden field which contains the input field name value.

<input type="text" name="field_1" />
<input type="hidden" name="field_1_name"/>

You need to add a hidden form field which contains the Id of the first field. You can name it as field1_ID or something.

<input type="text" name="first_field" value="As_Entered_By_User"/>
<input type="hidden" name="first_field_id" value="id_first_field"/>

Or if you are familiar with Javascript, You can post it using javascript with single form field putting the id as an attribute.

<input type="text" name="first_field" id="first_field_id" value="as_enteredBy_user"/>
<script>var id_to_post=document.form1.first_field.id;</script>

here form1 is the name of the form containing the input box.