How to solve PHP cross-site File Upload

PHP cross-site File Upload

You can upload videos to A video website.

Website B wants to call website A's interface to upload videos. The two websites are not on the same server.

The UPLOADIFY plug-in used by website. How does one implement cross-site upload?

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First of all, make sure that you can control site A and site B. You still want to use other websites to upload videos, but you do not want users to upload videos to other websites.

If a B is controllable, A can call an api B.

If A is A website of another person, such as youku, you want to upload the video to youku on your website and then get the video address.

In this case, you need to simulate logging on to youku and then upload the data through curl to obtain the returned value for analysis until the address or address is obtained.