I’m in the process of trying to create a Zend Framework plugin, or helper that will add AJAX file upload capabilities to a Zend Form. It needs to degrade gracefully so that a user can still upload a file in case they have JavaScript (or Flash) disabled in their browser.

Here’s some plugins I’ve found along the way that might help you:

• PHP Letter: AJAX File Upload jQuery Plugin
• Andrew Valums: AJAX Upload
• jQuery Form Plugin (includes AJAX file upload)
• Uploadify: multiple file upload plugin for jQuery
• Fancy Upload: MooTools AJAX file upload
• SWFUpload: JavaScript Flash AJAX file upload (degrades gracefully to normal HTML upload form)

If you have any experience (or success) with this, please share it in the comments.

I’ll post the solution when I am done.