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Editorial Team
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Asked: 2026-05-31T19:10:32+00:00

So I’m trying to just alert out my Hello from my php file, it’s

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So I’m trying to just alert out my “Hello” from my php file, it’s pretty straight forward but it’s not working for some reason.

JS

    function dynamic()
{
    if(window.XMLHttpRequest)
    {
        xmlhttp = new XMLHttpRequest();
    }
    else
    {
        xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
    }

    xmlhttp.onreadystatechange = function()
    {
        if(xmlhttp.readyState == 4 && xmlhttp.status == 200)
        {   
            window.alert(xmlhttp.responseText);
        }
    }

    xmlhttp.open("POST", "hello.php", true);
    xmlhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
}

dynamic();

PHP

<?php 
echo "Hello";
?>

HTML

<html>
<head>
    <title>Hello</title>
    <script src="dynamic.js"></script>
</head>
<body>

test

</body>
</html>

I can’t get the alert box to alert my “Hello”. It should just come straight from responseText.

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1 Answer

  1. Editorial Team

    You didn’t invoke send method. It sends the request MDN

    xmlhttp.send();

    If you want to put any data in POST put it in send methods parameter as urlencoded form.

    xmlhttp.send("foo=bar&hello=world");
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