<form method="POST" action="chk_kw.php">
<select name="website_string">
<option selected="selected"></option>
<option value="abc">abc</option>
<option value="def">def</option>
<option value="hij">hij</option>
</select>
<input type="submit">
</form>
print_r($_POST);
,
it'll show what's being submitted an the respective element name.To get the submitted value of the element in question do:
$website_string = $_POST['website_string'];