I'm trying to post data to a PHP page and check the response. Here is an example. What is wrong with this code?
index.html
<html>
<head>
<title>Post Ajax</title>
<script type="text/javascript">
function post(foo, bar) {
var xmlhttp = new XMLHttpRequest();
xmlhttp.onreadystatechange = function() {
if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
alert(xmlhttp.responseText);
}
}
xmlhttp.open("POST", "ajax.php", true);
xmlhttp.send("foo=" + foo + "&bar=" + bar);
}
</script>
</head>
<body>
<input type="button" value="Click me" onclick="post('one','two');" />
</body>
</html>
ajax.php
<?php
if (array_key_exists('foo', $_POST) && array_key_exists('bar', $_POST)) {
$foo = $_POST['foo'];
$bar = ($_POST['bar']);
// do stuff with params
echo 'Yes, it works!';
} else {
echo 'Invalid parameters!';
}
?>
Either I have a stupid typo or I am not using the send() method correctly.
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