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$.post to php file in Amazon EC2 doesn't seem to work

i have test.html and test.php file uploaded to /var/www/html in my AWS Amazon EC2

URL of test.html is : http://ec2-11-11-111-11.ap-northeast-1.compute.amazonaws.com/test.html

URL of test.php is: http://ec2-11-11-111-11.ap-northeast-1.compute.amazonaws.com/test.php

test.html is:

<!DOCTYPE html>
<head>
    <script type="text/javascript" charset="utf-8">
        function myFunction(){
            var url = "http://ec2-11-11-111-11.ap-northeast-1.compute.amazonaws.com/test.php";
            var data = "test_data_string"; 

            alert("Post to PHP"); //check to see if javascript is working

            $.post(url, {testdata:data},
                        function(echo){alert(echo);});
            }
    </script>
</head>
<body>
    <button onclick="myFunction()">Click me</button>
</body>
</html>

test.php is:

<?php
   $data = $_POST['testdata'];
   echo "success";
?>

I am expecting to get alert("success"); when I click the "click me" button, but I am getting nothing.

i get alert("Post to PHP"); when I click on the button. so it seems that both of the files are working except $.post(); What am i doing wrong here??

  1. These two urls are not accessible , I am not sure what you are doing but putting the php file online does not mean that it is accessible and will run as a script.
    URL1: http://ec2-11-11-111-11.ap-northeast-1.compute.amazonaws.com/test.html

    URL2: http://ec2-11-11-111-11.ap-northeast-1.compute.amazonaws.com/test.php

  2. Include jQuery library

update:
Your js does not have problem if you include the jquery library. I tested it sends the post request successfully. jsFiddle

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