JS:
jQuery.ajax({
type: "GET",
url: "YOUR PHP FILE PATH HERE",
data: {username:'username'}, // send the data to the PHP page here like username or whatever
dataType: "json",
success: function(data)
{
var unread_emails=data.email;
var unread_comments=data.comments;
var unread_whatever=data.whatever;
jQuery('li#emails').val("New Emails "+unread_email);
jQuery('li#comments').val("New Comments "+unread_comments);
jQuery('li#whatever').val("New whatever "+unread_whatever);
},
error: function()
{
alert("Some error");
});
あなたのPHPで
if(isset($_GET['username']))
{
**DO YOUR QUERY HERE TO GET UNREAD EMAILS, COMMENTS, WHATEVER and STORE IN VARIABLES**
$return=array('unread_emails'=>$unread_emails, 'unread_comments'=>$unread_comments, 'unread_whatever'=>$unread_whatever);
echo json_encode($return);
}