如何在没有Flash支持的情况下使用Ajax和Codeigniter上传文件？

I have tried to many javascript plugins but finally had to post this question. Which is the best way to upload files using PHP CodeIgniter framework & Ajax ?

I use Plupload for everything now. Because it is mostly client side driven it runs on any almost any webbrowser and platform(.net,php,etc)

It uses clever ways of detecting browser compatibility; It tries to inject Flash objects or silverlight into the client to allow for functionality such as chunked uploads allowing for uploads greater than 2gb, with speed(kb/s), queue management, etc.

This is truly an amazing uploader.. but it is so under exposed that it took me years to find this. And now my sites (with a bit of perfectionist work) look like Google or Facebook styled uploaders.. FOR FREE!

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I've used http://valums.com/ajax-upload/ with great success in a web app. That was over a year ago, though. I used Kohana, not CI, but it's really agnostic on that matter.

ajax does not natively support file uploads. you can achieve this by submitting a form to an iframe and reading the response. there are many plugins available which serves the functionality in an organized way.