Jquery - Add Text And Var To Value

I want to add normal text and a jQuery value to an input value. var amount = $('option:selected', this).val(); $('.customfield').val('clicks,

Solution 1:

Try this:

    $('.customfield').val('clicks,<?phpecho$userdata["id"] ?>,' + amount);

//--------double quote to id as is open and   ---------^^^^
//                   closed by single quote and remove last +

Solution 2:

var amount = $('option:selected').val();
    $('.customfield').val('clicks,<?phpecho$userdata['id'] ?>,' + amount);

Solution 3:

Try this

var amount = $('option:selected').val();
$('.customfield').val('clicks, <?phpecho$userdata["id"] ?>,'+amount+');

Solution 4:

var amount = $('option:selected').val(); // or var amount = $('#selectDropwdownId').val();
    $('.customfield').val("clicks,<?phpecho$userdata['id'] ?>," + amount );