具有一个流请求的同时卷曲请求

I'm using curl to get a live content from a server. Each time this server gives me a specific answer, I would like to send another curl request (not a stream one).

I have tried to use curl_multi_init but it doesn't seem to be the correct usage. curl_multi_init allows me to send several requests at the same moment, but I don't know if I can send a request while keeping the "stream request".

What I want to do, is :

AAAAAAAAAAAAAAAAAAAAAA
B        C           D

Where A is the stream request which should never stop, and B, C, D several requests sent thanks to A.

Is it possible to do this thanks to PHP? Thanks a lot.