javascript to php

basic_mind

okay I have been having some problems with a program i'm working on.
Basically I want to send variables through javascript to a php page where they can collect the information. I can do it using an image tag but I cant' seem to get it work with out. I'm not great with JS so any help would be fantastic.

statusquo

It's a long way around, but one possible way is to pass the javascript variables to the php page via the url.

EXAMPLE :

onUnload="window.location='page.php?var1=document.formname.fieldname"

Then on the page.php :

$variable = $_GET['var1'];

Hope that helps

bradgrafelman

Are you trying to do this passively/secretly, i.e. not redirect the user to a different page, but submit the data in the background?

What you COULD do, is make a new image in Javascript, and have the src point to your PHP script, like so:

function sendData(data) {

var hi = new Image();
hi.src = 'http://mysite.com/php/secret.php?data='+escape(data);

}

Then, you can send data at any time on your page by calling that function, such as in a link:

<a href="#" onClick="sendData(document.forms[0].username + ':' + document.forms[0].password)">Hi!</a>

basic_mind

sorry I'm trying to do it in the background, with out the user knowing it. don't want the page to redirect and I would like to not use an image if possible?

bradgrafelman

What's wrong with using an image? It's not really an image at all... it's just an object that makes their browser send a request to your server. Nothing is displayed to the user, or anything so... what's the problem with using an image??

basic_mind

because it has been causing a lot of problems with my script to the point that it does not work. thats whays wrong with an image.

planetsim

I talked about this in a previous thread although not fully implemented in every browser. Most recent ones have it XMLHttpRequest

Apple have pretty good documentation on it, shows how to get it working in most browsers. There are other tutorials by doing a google search (this was the first result that was found).

Weedpacket

Some further info is here.