Im new to jqeury ajax and i try to post something testso.php. I try to echo $_POST['test'] this on testso.php and its not showing anything. If i open my developer tools and check on preview i can see data is there. am i doing something wrong.

test.php

<script>
   var test = '123';
   
        $.ajax({
            type: "POST",
            url: "testso.php",
            data: { test: test },
            success: function(response) {
            console.log(response);
            }
        });

</script>

testso.php

<?php

if(isset($_POST['test'])){

    $img = $_POST['test']; 
?>

<div><?php  echo $img;  ?></div>

<?php  } ?>

i try to use document.getElementById('ajaxreturn').innerHTML=test; but this is not what i want. Maybe someone can suggest me how to echo the post.