PHP uses Curl to show expect:100-continue solutions _php Tips

The example in this article describes the Expect:100-continue solution for PHP using curl. Share to everyone for your reference. Specifically as follows:

When using curl post data, if the post has more than 1024 bytes of data, curl does not initiate a POST request directly. But there are two steps.

1. Send a request that contains a expect:100-continue in the header that asks the server if it is willing to accept the data.
2. Post the data to the server only after receiving the 100-continue response returned by the server.

This is Libcurl definition, you can see the relevant description: http://www.w3.org/Protocols/rfc2616/rfc2616-sec8.html#sec8.2.3

So there is a problem. Not all servers will respond to 100-continue. For example, LIGHTTPD will return "417 expectation Fail", which can cause logical errors.

The workaround is to include an empty expect in the header when sending the request.

I hope this article will help you with your PHP program design.