Right now I'm struggling to get this simple PHP AJAX request to work.
<html>
<head>
<script type="text/javascript">
function getSuggestions(type){
if(type == "")
{
document.getElementById("entries").innerHTML="test"
return;
}
if (window.XMLHttpRequest)
{// code for IE7+, Firefox, Chrome, Opera, Safari
xmlHttp=new XMLHttpRequest();
}
else
{// code for IE6, IE5
xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
}
xmlHttp.onreadystatechange = function(){
if(xmlHttp.readyState == 4 && xmlHttp.status == 200)
{
document.getElementById("entries").innerHTML=xmlHttp.response;
}
}
xmlHttp.open("GET","getData.php?status="+type,true);
xmlHttp.send();
}
</script>
</head>
<body>
<div id="A" onclick='getSuggestions("A")'>Click for A</div>
<div id="P" onclick='getSuggestions("P")'>Click for P</div>
<div id="R" onclick='getSuggestions("R")'>Click for R</div>
<div id="entries"></div>
</body>
</html>
Below is getData.php
<?php
$status = $_GET["status"];
echo $status;
?>
Everytime I click on any of the tags I get "undefined" in the "entries" tag. Could anybody explain why it's undefined?
使用xmlHttp.responseText
This is how I handle AJAX. Essentially an example of akellehe's answer
function getSuggestions(type){
if(type == "") {
document.getElementById("entries").innerHTML="test"
return;
}
var r = getXmlObject();
var url= "getData.php?status="+type;
if (r.readyState == 4 || r.readyState == 0) {
r.open("POST", url, true);
r.onreadystatechange = function (){
if (r.readyState == 4) {
document.getElementById("entries").innerHTML= r.responseText;
}
};
r.send(null);
}
}
////////////////////////////////////
function getXmlObject() {
if (window.XMLHttpRequest) {
return new XMLHttpRequest();
} else if(window.ActiveXObject) {
return new ActiveXObject("Microsoft.XMLHTTP");
} else {
alert('Status: Cound not create XmlHttpRequest Object. Consider upgrading your browser.');
}
}
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