如何将此表单拆分为两个值

How can i end up with two values after submit okay i was wondering how can i have the hidden value and another value containing the div text?? the reason why it because im going to insert both of those values in different variables to insert into a mysql query

html code:

<form action="" method="POST" onsubmit="return insert_value()">
    <input id="hidden_data" name="data" type="hidden" value="<?php $user_id ?>"/>
        <div id="showing_data" class="commenttext" contenteditable="true"></div>
    <input type="submit" value="Submit" id="submitthis" />
</form>

Javascript CODE:

function insert_value()
{
  var values = [];
    values.push(document.getElementById('hidden_data').value);
    values.push(document.getElementById('showing_data').textContent);
    console.log(values);
  return true;
}

Replace div with textarea and to disable resizing use css:

textarea {
    resize: none;
}

To answer your real question, but slightly modifying it; instead of merging them both in one input create another hidden input.

in HTML add this line:

<input type="hidden" name="data_result" id="data_result" />

And your javascript code:

function insert_value()
{
    var html = document.getElementById('showing_data').textContent;
    document.getElementById('data_result').value = html;
    return true;
}

just replace the div with textarea and add style = "resize:none" to the text area

<form action="" method="POST" onsubmit="return insert_value()">
        <input id="hidden_data" name="data" type="hidden" value="<?php $user_id ?>"/>
            <textarea style = "resize:none" id="showing_data" class="commenttext" contenteditable="true"></textarea >
        <input type="submit" value="Submit" id="submitthis" />
    </form>

and change following line in the javascript

document.getElementById('showing_data').value;

you can make it textarea and you can have hidden value of that.

    <textarea id="showing_data"  rows="4" cols="50">

and if you dont want to be draggable just use this in css

 textarea
{
 resize: none;
}