beri nama filenya test dan perbaiki letak jquery.js

<?php
if(isset($_POST['selectedValue'])){
     $display_data = $_POST['selectedValue'];
       echo "Anda Menulis: ".$display_data;
    $ok=1;
die();
}else{}

if(!isset($ok)){
?>
<hr/>
<form action="" method="post">
  <input type="text" class="input-text" name="inputtxt" placeholder="Input Your Text">
</form>
<div id='result'>&nbsp;</div>
<script src='jquery-1.11.1.js'></script>
<script>
(function($) {
  $('.input-text').on("keyup", function () {
    //get the selected value
    var selectedValue = $(this).val();
    var data = 'selectedValue='+selectedValue;

    //make the ajax call
    $.ajax({
      type: 'POST',
      url: 'test.php',
      data: data,
      success: function(result) {
          console.log(result);
          $('#result').html(result);
        //prosess disini hasilnya
        //alert('success !');
      }
    });
  });
})(jQuery);
</script>
<?php
}
?>