将JSON解析为UTF-8

I'm using the following code to get JSON from a page and parse it to my HTML page. The JSON is not being displayed in UTF-8 and therefore has weird characters. How can I remove the weird characters?

$.get("test.php", function (data) {
    var JSON = jQuery.parseJSON(data);
    $.each(JSON.deals.items, function (index, value) {
        // My code
    });
});

Please make sure that every single step of your process is in UTF-8:

• The database connection
• The database tables
• Your PHP file

• The content-type headers that you output

  header('Content-Type: application/json; charset=utf-8');

  <meta http-equiv="Content-Type" content="text/html; charset=utf-8">

Refer to: PHP json_encode json_decode UTF-8

EDIT: If you already have weird characters like \u00a3 in your JSON feed instead of the £ symbol, your problem has already been answered: https://stackoverflow.com/questions/1423846/convert-unicode-from-json-string-with-php