XMLHttpRequest发布数据未发送

时间:2014-01-17 08:27:57

标签: javascript php ajax query-string

这是javascript:

function eAC(emailData) {
    if (window.XMLHttpRequest) {
        httpRequest = new XMLHttpRequest();
    }

    if (!httpRequest) {
        return false;
    }

    console.log(emailData);

    var fd = new FormData();
    fd.append("email", emailData);

    httpRequest.onreadystatechange = eAC_callback; 
    httpRequest.open('POST', "http://website.com/file.php");
    httpRequest.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
    httpRequest.send(fd);
}

function eAC_callback() {
    if (httpRequest.readyState === 4) {
        if (httpRequest.status === 200) {
            var response = JSON.parse(httpRequest.responseText);
                console.log(response);
        } else {
            return false;
        }
    }
};

这是php:

$pec_result = array();

if(isset($_POST['email']) && strlen($_POST['email']) > 0){
    $pec_result['error'] = 'Its good';
    echo json_encode($pec_result);
    die();
} else {
    $pec_result['error'] = $_POST['email'];
    echo json_encode($pec_result);
    die();
}

此处的问题是$_POST['email']的值为NULL。当emailData的console.log()返回值时,为什么$ _POST ['email']为null。有人可以帮忙吗?我认为问题在于附加部分。 (不确定)

请不要jQuery 。我知道如何在jQuery中执行此操作,但我想学习如何在javascript中执行此操作。所以,谢谢

2 个答案:

答案 0 :(得分:4)

您的问题是,FormData请求的发送时间为multipart/form-data而不是application/x-www-form-urlencoded。删除设置内容类型的行。将FormData对象传递给XMLHttpRequest.send时,将自动设置正确的内容类型。

答案 1 :(得分:1)

试试(已编辑)

fd='email='+emailData;

完整代码:

function eAC(emailData) {
    if (window.XMLHttpRequest) {
        httpRequest = new XMLHttpRequest();
    }

    if (!httpRequest) {
        return false;
    }

    console.log(emailData);

//    var fd = new FormData();
//    fd.append("email", emailData);
      fd='email='+emailData;

    httpRequest.onreadystatechange = eAC_callback; 
    httpRequest.open('POST', "http://website.com/file.php");
    httpRequest.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
    httpRequest.send(fd);
}

function eAC_callback() {
    if (httpRequest.readyState === 4) {
        if (httpRequest.status === 200) {
            var response = JSON.parse(httpRequest.responseText);
                console.log(response);
        } else {
            return false;
        }
    }
};