问向PHP发送localStorage数据

EN

function postData(){

    var storage = JSON.stringify(localStorage);

    var xhr;

    if (window.XMLHttpRequest) {
        xhr = new XMLHttpRequest();
    }
    else if (window.ActiveXObject) {
        xhr = new ActiveXObject("Msxml2.XMLHTTP");
    }
    else {
        throw new Error("Ajax is not supported by this browser");
    }

    xhr.onreadystatechange = function () {
        if (xhr.readyState === 4) {
            if (xhr.status === 200 && xhr.status < 300) {
                document.getElementById('div1').innerHTML = xhr.responseText;
            }
        }
    };

    xhr.open('POST', 'Membership.php');
    xhr.setRequestHeader("Content-Type: text/json", "application/x-www-form-urlencoded");
    xhr.send("data=" + storage);

}

if ($_POST){

    $data = json_decode($_POST['data']);

    echo "The data" .$data;

}