PHP link rotating script

[hostsum]

I have this PHP link rotating script, it works pretty fine...
when I run the script it redirect to:
link1.com
link2.com
link3.com
.... and so on

but when I change the web browser or someone else runs it, it restart from the begging..

I mean that it redirect back to link1.com

 

the script use a link.txt file where the link list is stored
what I want is that when I run the script it redirect to 
link1.com
when I change the web browser or someone else runs it continue redirecting to next link and so on...(to link2.com)

 

Here's the PHP code:

<?php
	
	function redirect_to($link) {
		header("Location: {$link}");
		exit;
	}
		
	$links = file('links.txt');	
	
	while (!$links) {
		$links = file('links.txt');	
	}
	
	$links_count = count($links);	
	$one_month = 60 * 60 * 24 * 30;
	

		$index = $_COOKIE['link_index'] + 1;		
		setcookie('link_index', $index, time() + $one_month);		
		
		if ($index == $links_count) {
			setcookie('link_index', 0, time() + $one_month);		
			$index = 0;
		}
	
	redirect_to($links[$index]);
	
?>

 Please help me solve this issue

 

Thanks

[Muddy_Funster]

I don't understand what the problem is - mainly because you havn't explained what the script should be doing.

[hostsum]

Hey,

 

Thanks for your response.

The script should rotate links..

[Muddy_Funster]

yeah I got that bit, but we kinda need to know what the desired condition of the rotation should be Vs what it actualy is?

[AbraCadaver]

Just for fun.  links.txt needs to be writable by the webserver:

$file = 'links.txt';
$links = file($file);

if(filemtime($file) <= strtotime('-1 month')) {
    array_push($links, array_shift($links));
    file_put_contents($file, $links, LOCK_EX);
} 
header('Location: ' . trim($links[0]));
exit;

[AbraCadaver]

My bad.  Should be:

file_put_contents($file, implode('', $links), LOCK_EX)

[rythemton]

The problem is that you are using a COOKIE. Cookies are unique per computer and per browser, so when someone new gets on, or a new browser is used, their system has no 'link_index' cookie, and the count starts over. You need to save the 'link_index' on the server in some way that is not computer or browser specific. A Session won't work either, because it is also unique per computer and per browser, just stored on the server instead of the client machine.

[rythemton]

 

Just for fun.  links.txt needs to be writable by the webserver:

$file = 'links.txt';
$links = file($file);

if(filemtime($file) <= strtotime('-1 month')) {
    array_push($links, array_shift($links));
    file_put_contents($file, implode('', $links), LOCK_EX);
} 
header('Location: ' . trim($links[0]));
exit;

This solution should work for what you want, because it rotates the links in the file itself, rather than keeping a counter.