因此,在尝试让 javascript 使用 Ajax 将值传递给 php 脚本时,我收到以下错误消息。
未捕获的 SyntaxError:输入意外结束
在单步执行代码时,我发现我的脚本响应返回了一个空字符串。有人请指出我的错误,我似乎无法掌握它。
这是我的 javascript (request.js)
var request;
function getHTTPObject()
{
var xhr = false;
if (window.XMLHttpRequest)
{
xhr = new XMLHttpRequest();
} else if (window.ActiveXObject) {
try
{
xhr = new ActiveXObject("Msxml2.XMLHTTP");
}
catch(e)
{
try
{
xhr = new ActiveXObject("Microsoft.XMLHTTP");
}
catch(e)
{
xhr = false;
}
}
}
return xhr;
}
function runAjax(JSONstring)
{
// function returns "AJAX" object, depending on web browser
// this is not native JS function!
request = getHTTPObject();
request.onreadystatechange = sendData;
request.open("GET", "request.php?json="+JSONstring, true);
request.send(null);
}
// function is executed when var request state changes
function sendData()
{
// if request object received response
if(request.readyState == 4)
{
// parser.php response
var JSONtext = request.responseText;
// convert received string to JavaScript object
var JSONobject = JSON.parse(JSONtext);
// notice how variables are used
var msg = "Number of errors: "+JSONobject.errorsNum+
"\n- "+JSONobject.error[0]+
"\n- "+JSONobject.error[1];
alert(msg);
}
}
我的 php 文件。
<?php
//request.php
$decoded = json_decode($_GET['json']);
$json = array(
'errorsNum' => 2,
'error' => array(
"error 1","error 2!"
)
);
$encoded = json_encode($json);
die($encoded);
?>
最后是我调用 ajax 的 html 文件。
<html>
<head>
<script src="request.js">
</script>
</head>
<body>
<a href="Javascript:runAjax('vinoth')">call</a><br>
</body>
</html>
提前致谢。