Jquery with Ajax and PHP not working

Question

I am trying to brush up on my jquery and ajax. In Jquery in 8 hours there is this:

<!DOCTYPE html>
<htmlxmlns="http://www.w3.org/1999/xhtml">
<head>
<title>A JQuery Sample Program</title> 
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js">
</script>
<script type="text/javascript"> 
$(function() {
$.ajax({
type:"POST",
url:"postFile.php",
data: {data:100},
success:function(data) {
$("div").html(data);} });}); 
</script>
</head>
<body> 
Response: <div></div>
</body></html>

and postFile.php is this:

<?php
if ($_POST["data"]=="100") {echo "100";}
?>

I'm running this under IISExpress. BUT all I get from the browser (Chrome) is method not allowed in jquery.min.js:4. This seems so simple and yet, doesn't work.

Strange problem ... use non minified version to isolate more specific part of jQuery that is being used when error thrown. Just to be clear you are opening page on http protocol and not file:// protocol? — charlietfl
– charlietfl, Commented Sep 16, 2015 at 16:04
I changed to jquery.js and now get this error: try { // Do send the request (this may raise an exception) xhr.send( options.hasContent && options.data || null ); } catch ( e ) { (LINE 8625) ALSO, yes, using HTTP protocol. — Ron
– Ron, Commented Sep 16, 2015 at 16:06

I wrestled a bear once. · Accepted Answer · 2015-09-16 16:07:13Z

2

Method not allowed usually happens when you're trying to request a file that's on another domain. I assume that's not your real code since it looks like you're calling a file that's on the same domain. Read about cross domain scripting. You can't do AJAX calls to a script that's on a different domain.

answered Sep 16, 2015 at 16:07

I wrestled a bear once.

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14 Comments

samrap Over a year ago

Actually, there is a pretty simple workaround if you need to call ajax from another domain using a proxy: stackoverflow.com/questions/2558977/ajax-cross-domain-call

I wrestled a bear once. Over a year ago

There are workarounds, yes, but they're just that, workarounds. you still cannot make an ajax call to another domain. Making an ajax call to a PHP script that does a curl call is not making an ajax call to another domain. my answer is 100% accurate.

samrap Over a year ago

I'm not denying that :) just adding a workaround for op if desired

Ron Over a year ago

This is exactly my code. Both files are accessed off the virtual root. They are in the same place, so I'm not sure what the other domain is.

I wrestled a bear once. Over a year ago

@Ron hmm, well, for whatever reason it looks like your browser thinks it's a different domain. Try and figure out why that might be. If you open it in the browser in a tab next to the HTML, does the URL look the same, etc..

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