How do I pass a javascript variable into php without redirection?

How do I pass a javascript variable into php without redirection?
For example the variable publisherid, how do I use it inside some php code

Code JavaScript:

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<script type="text/javascript">
publisherid = 'something';
variable1 = 'something';
variable2 = 'something';
//your code can access these variables!
</script>
<script type="text/javascript" src="http://example.com/your-ad-serving-script.php"></script>

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PHP is a server side language which means that it is 100% finished before JavaScript gets a chance to access it. What are you trying to accomplish?

One way could be to put js variable in form hidden field value and then after php_self submit you will have it on that same page as variable $_POST(or GET)['hiddenFieldName']

You could have PHP write out tha javascript

either like:
[code]
<script>
var phpVar="<?php echo $jsVar; ?>";
</script>

or have php write all the javascript.

To pass from javascript TO PHP, you can use AJAX.

Quote:

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Originally Posted by wonshikee

To pass from javascript TO PHP, you can use AJAX.

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please could i have any examples
i'm need your help to create an ad company
And I cannot go any further by not knowing how to make the javascript variable be passed to the php page.

This is important because the javascript variable corresponds to the id of the ad code which is different for each user.

Therefore, the php page retreives all the data from the javascript variable.

A classic example is a javascript statcounter script which gets the screen resolution and then the php page inserts it into a mysql database.

HTML Code:

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<script type='text/javascript'>
function ajaxFunc() {
                var data1; // populate however you want
                var data2; // same here
                var ajaxReq;
                try {
                        // Opera 8.0+, Firefox, Safari
                ajaxReq = new XMLHttpRequest();
                } catch (e){
                        // Internet Explorer Browsers
                        try {
                                ajaxReq = new ActiveXObject("Msxml2.XMLHTTP");
                        } catch (e) {
                                try {
                                        ajaxReq = new ActiveXObject("Microsoft.XMLHTTP");
                                } catch (e) {
                                        // Something went wrong
                                        alert("Your browser broke!");
                                        return false;
                                }
                        }
                }
                var queryString = "?id="+data1+"&id2="+data2;

                ajaxReq.open("GET", 'ajaxscript.php' + queryString, true);
                ajaxReq.onreadystatechange = function() {
                        if(ajaxReq.readyState == 4){
                                response  = ajaxReq.responseText;
                                alert(response);
                        }
                }
                ajaxReq.send(null);
}
</script>

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Invoke the ajaxFunc() however fits your needs. Populate the necessary data you will be passing. Then put the code below in your ajaxscript.php.

That's all you should need to understand how to get you started in Ajax.

PHP Code:

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<?php
    echo "Your first data is : ".$_GET['id']." and second is : ".$_GET['id2'];
?>

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