Untitled

<?php
if ($_SERVER["REQUEST_METHOD"] == "POST")
{
    echo $_POST['obj'];
}
?>
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<script type="text/javascript" src="js/jquery.js"></script>
<script type="text/javascript">
var response = "lalalala";
function lol()
{
    $.ajax({
        url: '<? echo $_SERVER['PHP_SELF']; ?>',
        type: 'POST',
        data: { 'obj' : 'informazioni' },
        dataType: "html",
        success: function ( response )
        {
            console.log(response)
        },
        error: function () {
        alert("Chiamata fallita!!!");
          }
    });
}
</script>
<title>Documento senza titolo</title>
</head>

<body>
<input type="button" onClick="lol();" value="LOL" />
</body>
</html>