PHP - error when using socket_recv

Question

I have a socket error when running the socket_recv inside this function:

function readByteXByteSIBmsg() {
    $msg = \"\";
    $buf=\"\";
    try {
     while( $         


        

Answer 1

The error is EAGAIN (or EWOULDBLOCK, sometimes those are the same error) and means that the socket is non-blocking and that there is nothing to read at the moment. You can busy-wait while you have that error until you read something, or you use some other method to find out if there is data to read before trying to receive.