Wordpress Cookie hidden field - wordpress

Question

In Wordpress, I try to write o cookie into a hidden field. I have a cookie:
if(isset($_GET['ecselis']))
{
$cookie_name = "ecselis";
$cookie_value = $_GET['ecselis'];
setcookie($cookie_name, $cookie_value, time() + (86400 * 30), "/");
$_SESSION["ecselis"] = $cookie_value;
}
else if(isset($_COOKIE['ecselis'])) {
$_SESSION["ecselis"] = $_COOKIE['ecselis'];
}
else
{
}
This working fine. But I dont realy know how should I write it into a hidden field
<input id="ecselis_field" name="ecselis_field" type="hidden" value="" />
I tried
<input id="ecselis_field" name="ecselis_field" type="hidden" value="$.cookie('ecselis')" />
but it doesn't work at all.

Answer 1

Here is some solution for you, if you want to use js/jquery ( function for getting cookie getCookie() used from this answer ):
function getCookie(name) {
var value = "; " + document.cookie;
var parts = value.split("; " + name + "=");
if (parts.length == 2) return parts.pop().split(";").shift();
}
jQuery(document).ready(function ($) {
$('#ecselis_field').val(getCookie('ecselis'));
})
Add this code into some .js file of your theme/child theme or create your own one.
Tested and works.