... PHP 4 >= 4.1.0) socket_accept -- Accepts a connection on a socket . ... Once a successful connection is made, a new socket descriptor is returned, which may be used for communication. ... If socket has been made non-blocking using socket_set_blocking() or socket_set_nonblock() , an error code will be returned. The socket descriptor returned by socket_accept() may not be used to accept new connections. ... Returns a new socket descriptor on success, or a negative error code on failure. ...