Suggestions for designing a app

I don't know what kind of security you'd need here, but assuming that you're going to interact with a database you might look at encoding the links using base64_encode() or something similar. It would at least prevent most URL tampering and SQL injection. Like:

PHP Code:

$link = "https://www.somedomain.com?v=".base64_encode("customerid=x&stars=5"); 


Or as a CI URL segment

PHP Code:

$link = "https://www.somedomain.com/click/".base64_encode("customerid=x&stars=5"); 


Then upon click check using base64_decode's strict mode like:

PHP Code:

if(base64_decode($request->getPostGet('v'), TRUE)) { } 


or

PHP Code:

if(base64_decode($uri->getSegment(2), TRUE)) { } 


If it returns FALSE, you know something is amiss and you shouldn't trust the values. You also could go a step further and include timestamps or tokens in the string to add even more security.

Hope that gets you going in a good direction.

Designer, developer and Diet Dr. Pepper addict. Messing up PHP since <?= $when['year';] ?>