我在同一页面中用ajax发布，但是我无法在php中接收

Question

I would post in the same page. For this i post with ajax. But i post and receive in the same page.

The code :

<script src="https://code.jquery.com/jquery-3.1.1.min.js"></script>

<script type="text/javascript">

        $("#menusecme1").on("change", function() {

                var deger = $("#menusecme1").val();

            $.ajax({ 

                url: "okulue.php",
                type: "POST",
                data: {
                    menu : deger
                },
                success: function(){



                }

            });
        });

</script>

İn success i created an alert function it working. So in this code have any problem.

The php code:

if (isset($_POST["menu"]) == 'yes') {
}

if (isset($_POST["menu"])) {
}

I tried this if. But they not work.

How can i resolve this problem?

I need your help.

Answer 1

isset() returns boolean and not what you have.

Below will help you test.

in php script, do this

echo isset($_POST['menu']) ? 'yes' : 'no';

This will echo out yes should $_POST['menu'] be set

Personally i would go for empty() as it also checks if the variable is also set.

echo !empty($_POST['menu']) ? 'yes' : 'no';