How to disable PHP's POST caching?

PHP seems to cache POST data, and waits for the entire POST to finish sending before it makes it available to php://input. I'd like to be able to read the post data from php://input while the client is still uploading it. How can I cause PHP to make the POST data available right away instead of after the client finishes sending? Regards, Adam Zey. PS: As far as I can tell, PHP caches the entire POST in memory as it is being sent, but just doesn't make it available to php://input until after the client is done. Since PHP already has it in memory, why isn't it accessible?