Question

i am having trouble making this part of code to work, basically i want to call this function which sends a variable to a php page. Ive tested that the variable is there and also tested that my php page is accepting information as it should be , however i cant make this Ajax thing work.

function ajaxRequest(myname) {
var AJAX = null; // Initialize the AJAX variable.
if (window.XMLHttpRequest) 
{ // Does this browser have an XMLHttpRequest object?
    AJAX=new XMLHttpRequest(); // Yes -- initialize it.
} else 
{ // No, try to initialize it IE style
    AJAX=new ActiveXObject("Microsoft.XMLHTTP"); // Wheee, ActiveX, how do we format c: again?
} // End setup Ajax.

if (AJAX==null) 
{ // If we couldn't initialize Ajax...
    alert("Your browser doesn't support AJAX."); // Sorry msg.
return false // Return false, couldn't set up ajax
}
AJAX.onreadystatechange = function() 
{ // When the browser has the request info..
    if (AJAX.readyState==4 || AJAX.readyState=="complete") 
    { // see if the complete flag is set.
        callback(AJAX.responseText, AJAX.status); // Pass the response to our processing function
    } // End Ajax readystate check.
}

alert("Alert1");
var url='http://localhost/main.php?Name=myname';    
AJAX.open("POST", url, true); // Open the url this object was set-up with.
alert("Alert2");
AJAX.send(); // Send the request.

}

This is my php part which should accept the variable

<?php
$var=$_GET['Name'];

echo $var;
?>

Answer 1

Okay firstly you need to change your request to GET from POST
like

AJAX.open("GET", url, true); // Open the url this object was set-up with.

and you also need to update this line
from

var url='http://localhost/main.php?Name=myname'; 

to

var url='http://localhost/main.php?Name='+myname; 

my full script is:

<script type="text/javascript">
    function ajaxRequest(myname) {
        var AJAX = null; // Initialize the AJAX variable.
        if (window.XMLHttpRequest) 
        { // Does this browser have an XMLHttpRequest object?
            AJAX=new XMLHttpRequest(); // Yes -- initialize it.
        } else { // No, try to initialize it IE style
            AJAX=new ActiveXObject("Microsoft.XMLHTTP"); // Wheee, ActiveX, how do we format c: again?
        } // End setup Ajax.

        if (AJAX==null) 
        { // If we couldn't initialize Ajax...
            alert("Your browser doesn't support AJAX."); // Sorry msg.
            return false // Return false, couldn't set up ajax
        }

        AJAX.onreadystatechange = function() 
        { // When the browser has the request info..
            if (AJAX.readyState==4 || AJAX.readyState=="complete") 
            { // see if the complete flag is set.
                callback(AJAX.responseText, AJAX.status); // Pass the response to our processing function
            } // End Ajax readystate check.
        }

        alert("Alert1");
        var url='http://localhost/main.php?Name='+myname;    
        AJAX.open("GET", url, true); // Open the url this object was set-up with.
        alert("Alert2");
        AJAX.send(); // Send the request.
    }
</script>

you might also be missing the callback function so add it so that it looks like this

function callback(x, y) {
    alert(x);
}

And call your AJAX function by

ajaxRequest("ashley");

Here is your required main.php code (even though this isn’t what you should be using AJAX for

<?php 
session_start();
if(isset($_GET["Name"])) {
   $_SESSION["Name"] = $_GET["Name"];
}
if(isset($_SESSION["Name"])) {
   echo $_SESSION["Name"];
} else {
   echo "The AJAX has not been run!";
}
?>