Is it worth buying an iPhone 4s this 2015?

So I'm planning to buy a new, cheap phone because my iPhone 5c is broken. The screen is detached from the whole phone so i find it really hard to use it. I just wanna know if it's still worth buying an IPhone 4s. Btw i'm just gonna use it for photography, and communication purposes.
Anyways, feel free to suggest or what you think.

If you plan to use that phone for just texting and calling. Then sure go for it. If you need to use it for games and photos, then no.

Worth it for what? Your question says nothing about how much that iPhone is compared to newer models. Obviously if you're wondering if something is worth paying for it matters to say how much you're paying. IPhones are good phones and since you've already had one you can be reasonably sure you can run your apps.

However while the 4s will run iOS 8, it may not run it as well as your previous phone.

http://mashable.com/2014/09/25/iphone-4s-ios8/

Unlike your last phone the 4s doesn't connect to LTE.

You are better off investing in a 5s if your not looking to spend a lot of money. The 4S is no longer made anymore and its not worth it to down grade like that.