passing values from html/js to remote php script

hello,

I noticed that there are several script that using an include file inside a javascript tag.

With this file there visitor statistics stored inside a database. How does this happen? is there a point some where I can start?

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I am not sure what you are asking here,

You are asking why they usejavascript to store statistics, or how do they do that?

I am not sure what you are asking here,

You are asking why they usejavascript to store statistics, or how do they do that?

yes something like that, they include a remote JS file and inside the JS is written a image tag and this image tag source sends all information like referer, IP address to the script.

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They do that to prevent referer spam, as most bots will not execute javascript, or load images from the page that they are spamming.

The problem is that this technique can cause big overhead to high traffic websites....

I just need a way to use my visitor counter inside a html file...all this stats counter are doing this that way...

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It is easy to do that. You just need to send a header (that the document is an image)

If you want the code for the image header let me know, so I can post it from work tomorrow (I'm @ home now)

... you create an image and your retrieving the header information? how is this called?

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no you call a php doc like it was an image (eg. <img src=".........php" )

and in the php file you send the header to 'trick' the browser that the file is image.

no you call a php doc like it was an image (eg. <img src=".........php" )

and in the php file you send the header to 'trick' the browser that the file is image.

yes right but how do you retrieve the referer information of the document? Javascript?

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I am not sure about that, but js is a solution for that.

I am not sure about that, but js is a solution for that.

Thanks I will give it a try...

#offtopic:

I think in two month I'm the richest man here...

I got it working:

I'm including a JS file with code inside my html file (somewhere inside the body):

Code:

var ref = document.referrer;
document.write("<img src=\"/include/count_visitor_statistics/count_image.php?ref="+ref+"\" border=\"0\" />");

Inside the file "count_image.php" I have acces to these variables and I'm using this code to show a small picture (1px transp. gif)

Code:

<?php
class Count_image extends Count_visitors {

function Count_image() {
$this->referer = (!empty($_GET['ref'])) ? $_GET['ref'] : "";
$this->host = "www.".ltrim($_SERVER['HTTP_HOST'], "www.");
$url_parts = parse_url($_SERVER['HTTP_REFERER']);
$this->visited_page = $url_parts['path'];
$this->db_connect();
}
}
$img_count = new Count_image;
$img_count->delay = 1; // how often (in hours) a visitor is registered in the database (default = 1 hour)
$img_count->insert_new_visit(); // That's all, the validation is with this method, too.

// code to show a 1px transparent image

header("Content-type: image/gif");
$img = fopen("./spacer.gif", "r");
fpassthru($img);

This code will be added to the class "Counter & visitor statistics" soon.

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Cool

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