Pass javascript var to php using ajax on same page

Pass javascript var to php using ajax on same page

My php/html code below'

After one of the <li> tags is chosen the var choice contains the text() value of that <li>.

How can I/is it possible to use AJAX to pass choice to the php code  

  1. <?php

    set_include_path( '../../include' );
    error_reporting (E_ALL ^ E_NOTICE);

    $str=<<<LABEL

    <style>
    .hov:hover {
        color: red;
        font-weight: bold;
        }
       
    li    {
        list-style-type:none;
        }   
    </style>

    <script src="../jquery/jquery-2.1.4.js"></script>

    <script type="text/javascript">

         $(function(){
              $("li.hov").click(function () {
                    var choice="";
                  console.log("testing");
                  choice=($( this ).text());
                  alert("You chose: " + choice);
  2. ADD AJAX CODE HERE ? TO PASS choice TO PHP CODE ON THIS PAGE ?
     
              });
        });

    </script>

    LABEL;

    chdir('/home/rick/Desktop');
    echo $str;
    $path=getcwd();
    $items=scandir($path);

    echo "<p>Contents of $path</p>";
    echo '<ul>';
    $i=0;
    foreach($items as $item) {
        if(is_file($item) || $item=="." || $item=="..") {
            continue;
        }
        $disp='disp'.++$i;
       
        echo "<li id=$disp class='hov' >$item</>";
    }
    echo '</ul>';

  3. DO STUFF HERE WITH RESULT PASSED BACK BY AJAX ?

  4. ?>