Is it necessary to use Timthumb in Wordpress 2.9+?

Question

as Wordpress 2.9 comes with built in post thumbnail features, is it necessary to use Timthumb ?

Answer 1

With post thumbnails don't have the ability to dynamically crop and zoom images.

Another solution is to use Justin Tadlock's Get The Image Plugin. The Plugin tries to use the_post_thumbnail() wherever possible and gives you full control of sizing cropping and displaying images. It also allows you to grab images by custom fields.

Answer 2

It is not necessary, but many WordPress themes and plug-ins still use it.

If you don't use any of those, then you don't have to have/install/use TimThumb. If you do, then you are likely to have issues without it because most of those themes and plug-ins are overriding the default functionality deliberately, or are not passing along images in a way that WordPress' default thumbnail feature knows about it.