drop down value not post

Question

Thanks to some help here, I have a drop down in an html form.

<p>
    <select id="CategorySelection">
        <option value="0">Choose One</option>
        <option value="Research">Research</option>
        <option value="Innovation">Innovation</option>
        <option value="Application">Application</option>
        <option value="Integration">Integration</option>
    </select>
</p>

Depending on what you choose - javascript shows different questions to follow this. The following questions and everything else are posting to the db (mysql) table fine. I can't get this value to post- it just shows NULL. Is there something I am missing because of the javascript? I am really new in that area. Thanks!

Answer 1

$_POST values derive from the name attribute, not the id. Your select just needs a name, like this:

 <select name="CategorySelection" id="CategorySelection">

Then you can access its value in the $_POST array as usual:

if (isset($_POST['CategorySelection'])){
    $category = $_POST['CategorySelection'];
}

Answer 2

您将select属性“id”设置为一个值，您需要为其设置“name”属性，然后从PHP的$ _POST数组中调用该键。