Whether it is possible to find out somehow the server is available before sending request?

Question

PHP

There is an array of 100 objects that the Post should send as a request.
Is it possible to pre-check if the server is available before sending the request.

Answer 1

technically possible.
but why? just send a request / handle an error and set a timeout if necessary.
the request is not spit out immediately. connection is established first, and only when it is established, data is sent.