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Asked: 2026-05-21T10:32:50+00:00

I have a page, test.php, with the following code: <html> <body> <form> <script type=text/javascript>

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I have a page, test.php, with the following code:

<html>
    <body>
        <form>
            <script type="text/javascript"> 

                function SendCookies(){

                    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)
                        {
                            alert('done');
                        }
                    }

                    xmlhttp.open("GET", "/web/DEV/Classes/SetCookie.php?time=" + new Date());
                    xmlhttp.send();

                }

            </script>

            <input type="text" id="txtInput" name="txtInput"/>
            <input type="button" id="btnSubmit" name="btnSubmit" value="Submit"  onclick="SendCookies()"/>
            <div id="divTest">
                <?php
                    if (isset($_COOKIE["TestCookie"])) {
                        echo $_COOKIE["TestCookie"];
                    } else {
                        echo "__Results__";
                    }
                ?>          
            </div>
        </form>
    </body>
</html>

I have a page, SetCookie.php, with the following code:

<?php 
    $var = "THIS IS  A  TEST";
    setcookie("TestCookie", $var, time()+60*60*24*30);
?>

When test.php’s button is clicked, i use XMLHttpRequest to call my SetCookie.php page. The page executes, becuase if i add an echo to it, i get that in the xmlhttp response. However, TestCookie does not seem to be getting set.

If in text.php, i do the same command found in SetCookie.php, the cookie is then set accordingly for all browser sessions.

Even after i close / open the browser, the cookie remains unchanged from when i once set it in my test.php page manually.

—-EDIT—–

I added:

if(!setcookie("TestCookie", "A", time()+60*60*24*30, "/")) {
    echo "FAIL";
}

to the very top of test.php, however when i reload the page, it never shows the updated cookie… because that cookie was already set without the ,”/” parameter, and cannot be modified later, with the ,”/” parameter.

After clearing the cache and working with the suggested code, i cleared my cookies from the browser and used the added parameter for the set method, i was able to manipulate the cookies from all pages!!! thank you so much!!

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1 Answer

  1. Editorial Team

    If you don’t add a $path value to setcookie(), it defaults to “the current directory”. This means that if you set the cookie from /web/DEV/Classes/SetCookie.php, the cookie gets set to /web/DEV/Classes/, and anything above that path won’t see that cookie.

    To fix this, add a specific $path to setcookie. If your app runs on the domain root (example.com), use '/'. If it’s in a subfolder (example.com/myapp/), use '/myapp/' 

    setcookie("TestCookie", $var, time()+60*60*24*30, '/');
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