Webring

[Kinopio]

I'm trying to make a webring for a network of sites but needed help with a couple things. So let's say there are 3 sites:

 

1) Site A

2) Site B

3) Site C

 

Is there a way to generate a link that would take you from Site A to Site B, but if Site B was deleted, Site A's link would take you to Site C instead. I also want to do the reverse (for the "Previous" sites on the webring). I was thinking you can somehow use an array, but I'm not sure how it would know which site you were coming from and then redirect to the next one. I hope I said that the way I wanted. I'm still a beginner at PHP, so thanks in advance for any help! 

[D3v 7oW]

So you want a code that if site a isnt up then the link is disabled? and if site b isnt up the link is disabled, etc...

[Kinopio]

I guess that was confusing. Basically what I want is if you were at Site A and clicked a link that sent you to www.mywebsite.com/next.php, that page (next.php) would redirect you to Site B. If you were at Site B and you clicked the same link, www.mywebsite.com/next.php, it would redirect you to Site C and so on. Forget about the whole deleted thing. Maybe it's not even possible, so I don't know. I'm still a fledgling PHP user.

[benphelps]

Maybe:

 

<?php
$fp = fsockopen("www.example.com", 80, $errno, $errstr, 30);
if(!$fp){
// site is down, use next site
}
else {
// site is up, continue to site
}
?>

 

I have not tested this, but I think it will get you started with the site deleted thing.

 

This might work for the next.php

 

<?php

$siteID = $_GET['siteID'];
$nextsite = $siteID++;
$newurl = 'www.example.com/next.php?siteID='.$nextsite.'';

?>

 

This will work for a numerical web ring, where the users starts at site 1 and stops at the last site.  This is very basic and would require some more code to work, but I think this is the basics.  You might be able to use cookies if the users decides to browse the site before clicking the next site link.

[Kinopio]

Uh, does this look like I'm on the right track, sorta?

 

<?php
$siteID[0] = 'http://example1.com';
$siteID[1] = 'http://example2.com';
$siteID[2] = 'http://example3.com';

$siteID = $_GET['siteID'];
$nextsite = $siteID++;
$newurl = 'http://example.com/next.php?siteID='.$nextsite.'';
echo "<meta http-equiv=\"refresh\" content=\"3; url={$newurl}\">";
?>

 

I don't understand how to get the site's current id though. =\

 

You might be able to use cookies if the users decides to browse the site before clicking the next site link.

 

How do you make cookies. o_o

[Kinopio]

Anyone have any ideas?

[BlueSkyIS]

Uh, does this look like I'm on the right track, sorta?

no. you're defining array elements for $siteID, then overwriting $siteID as a scalar:

 

<?php
$siteID = array(); // you should have this line to define the array
$siteID[0] = 'http://example1.com'; // element added to array
$siteID[1] = 'http://example2.com'; // another element added to array
$siteID[2] = 'http://example3.com'; // another element added to array

$siteID = $_GET['siteID']; // $siteID is re-defined as a scaler containing $_GET['siteID']. the array you loaded is now gone.
$nextsite = $siteID++;
$newurl = 'http://example.com/next.php?siteID='.$nextsite.'';
echo "<meta http-equiv=\"refresh\" content=\"3; url={$newurl}\">";
?>