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如何顯示來自PHP中的javascript XMLHttpRequest()的POST值

[英]How to display POST values which are coming from javascript XMLHttpRequest() in php

我正在使用XMLHttpRequest()javascript函數將參數發送到Json formate中的另一個php頁面,但是$ _POST ['appoverGUID']無法獲取發布值。

這是我的Javascript代碼。

        function loadPage(href){

            var http = new XMLHttpRequest();
            var url = json.php;
            var approverGUID = "Test";
            var params = JSON.stringify({ appoverGUID: approverGUID });
            http.open("POST", url, true);
            http.setRequestHeader("Content-type", "application/json; charset=utf-8");
            http.setRequestHeader("Content-length", params.length);
            http.setRequestHeader("Connection", "close");
             http.onreadystatechange = function() {
                if(http.readyState == 4 && http.status == 200) {
                    document.getElementById('bottom').innerHTML = http.responseText;

                }
            } 
            http.send(params);

        }

這是我的json.php文件代碼。

if(isset($_POST['appoverGUID'])){
echo $_POST['appoverGUID'];
}

您需要使用json_decode 像這樣:

if ("application/json" === getallheaders())
    $_JSON = json_decode(file_get_contents("php://input"), true) ?: [];

以此方式填充參數(此處未對ApproverGUID內容進行轉義/編碼):

params = "appoverGUID="+approverGUID;

另請參閱:

http://www.openjs.com/articles/ajax_xmlhttp_using_post.php

首先刪除這些標頭,因為它們將由瀏覽器自動發送,這是正確的方法。

http.setRequestHeader("Content-length", params.length);
http.setRequestHeader("Connection", "close");

此代碼是跨瀏覽器解決方案,已經過測試。

// IE 5.5+ and every other browser
var xhr = new(window.XMLHttpRequest || ActiveXObject)('MSXML2.XMLHTTP.3.0');
var params = "appoverGUID="+approverGUID;
xhr.open("POST", url, true);

xhr.setRequestHeader("Content-type", "application/x-www-form-urlencoded; charset=UTF-8");
xhr.setRequestHeader("Accept", "application/json");
xhr.onreadystatechange = function () {
    if (this.readyState === 4) {
        if (this.status >= 200 && this.status < 400) {
            console.log(JSON.parse(this.responseText));
        }
    }
}
xhr.send(params);
xhr = null;

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