Sometimes, We need to request some other http address in order to get the data(we call it data api usually) in a application, As we know, tradition request in PHP is a serial way(one by one, eg: curl, file_get_contents) that is inefficient and affect user experience, even make the server down, So we need the ConcurrentRPC.
$ConcurrentRPC = new ConcurrentRPC;
$request = $ConcurrentRPC
->get('http://some.one.get.url...', 'some-one-get-url-return-key')
->get('http://the.other.get.url...', 'the-other-get-url-return-key')
->post('http://some.one.post.url...', 'some-one-post-url-return-key', array('key' => 'value'));
$result = $request->receive();
$request->broadcast();
see more demo in the demo directory.