php – 使用xml将javascript变量发布到服务器

我在这里的第一篇文章我是 Java / AJAX的新手,但我有一些 PHP经验.我试图将html表单数据传递给php文件进行处理.目标是让php脚本处理表单数据并返回true / false标志.我正在尝试AJAX,因为我不想要屏幕刷新.根据php脚本的响应,弹出窗口将覆盖现有屏幕,并向用户显示信息.

我的HTML表单代码是： –

<form name="screen3" method="post" action="" id="scr3" />
<input type="image" src="images/proceed.jpg" alt="Proceed" id="proceed1" name="submit" value="Send" />
</form>

我使用javascript从表单重定向了提交按钮： –

<script type="text/javascript">
$(document).ready(function() {
$('#proceed1').click(function(e) {
    e.preventDefault();
    x=validateScreen3();
    if (x) {getFormData();}
        })
    });
</script>

到目前为止一切顺利,validateScreen3()被调用并验证用户条目(不会让你厌烦脚本).调用getFormData但问题出在哪里： –

function getFormData() {
var xmlhttp;
var emailAddress = document.getElementById("emailaddress").value;
var entryCode = document.getElementById("entrycode").value;
var acceptance = document.getElementById("acceptance").value;
var Sel = document.getElementById("sel").value;


xmlhttp=new XMLHttpRequest();
xmlhttp.open("POST","test1.php",true);
xmlhttp.setRequestHeader("Content-type","application/x-www-form-urlencoded");
xmlhttp.send("emailaddress="+emailAddress);
}

我已经确认变量数据已传递给函数ok,但上面引用的test1.php脚本似乎正在被调用/执行.这是test1.php文件： –

<?php
$here = $_POST['emailaddress'];
echo '</div></div>';
if (!empty($here)) {
echo '<div style="position:absolute; top:100px; left:300px; width:400px; height:200px; background-color:#CCC; color:#000; z-index:50;">';
echo 'got the variable '.$here;
echo '</div>';
}
else {
echo '<div style="position:absolute; top:100px; left:300px; width:400px; height:200px; background-color:#CCC; color:#000; z-index:50;">';
echo 'DIDNT GET the variable '.$here;
echo '</div>';
}

?>

这些div都没有显示出来,并且从我能想到的每个测试中都可以看出,文件根本就没有被调用.任何想法或建议将不胜感激.

xmlhttp.onreadystatechange = function(response)
{
    if (this.readyState===4 && this.status===200)
    {//readyState 4 means request is finished
        document.body.innerHTML += response;//since it's an HTML response...
    }
};

var xhr =new XMLHttpRequest();
xhr.setRequestHeader('Content-type','application/x-www-form-urlencoded');
xhr.onreadystatechange = function()
{
    if (this.readyState === 4 && this.status === 200)
    {//response is xhr property in vanilla JS
         document.body.innerHTML += this.responseText;
    }
    if (this.readyState === 4 && this.status !== 200)
    {//error in request
        console.log(this);//<-- check your console
        document.body.innerHTML += '<h1>Http error: ' + this.status;
    }
};
xhr.open("POST",true);
xht.send("emailaddress="+emailAddress);

$.ajax({ url: 'test1.php',type: 'POST',data: {emailaddress: $('#emailaddress').val()},success: function(response)
         {
              document.body.innerHTML += response;
         }
});