PHP socket (socket_read)

Question

I work on a personal project and i have a problem for managing socket on a multi client server.

So, according to php.net, it's possible to put in argument of socket_read() a socket create by socket_create or accepted by socket_accept...

If i understand, socket create by socket_create is a "local" socket and sockets send by socket_accept are sockets client, it's that ?

in this case, i would like to put my server socket in parameter of socket_read for wait a client among several write on this socket.

more clearly, i accept 4 clients and wait that one of them write on this socket, but i can't put in parameter a specific client socket because i don't know which of them will write...

And when i put the socket create by : socket_create, php return me an error

my native language is not English as you could see, but nobody could answer me...

if (($sock = socket_create(AF_INET, SOCK_STREAM, SOL_TCP)) === false) {
            echo "socket_create() a échoué : raison : " . socket_strerror(socket_last_error()) . "\n";
        } 

        if (socket_bind($sock, $this->address, $this->port) === false) {
            echo "socket_bind() a échoué : raison : " . socket_strerror(socket_last_error($sock)) . "\n";
        }

        if (socket_listen($sock, 5) === false) {
            echo "socket_listen() a échoué : raison : " . socket_strerror(socket_last_error($sock)) . "\n";
        }

        for($i=0;$i<$this->maxClient;$i++){

            if(($client = socket_accept($sock)) === false){
                 echo "socket_accept() a échoué : raison : " . socket_strerror(socket_last_error($sock)) . "\n";
                 break; 
            }else echo "<br/>Client $client[$i] has connected\n";


            $this->joueurs[$i] = new Joueur($client,$i);
        } 
                    while($start){
            $messageClient = socket_read($sock , 1024);
                        ......
                    }

So,I have two problems, the first is, i need that socket_read() doesn't block my script and Scanning my sockets until it find something to read.

The second problem is that as my program does it not stopped, my client don't receive anything and when i stop my serveur my client receive the message...

Have you any idea ?

Thanks

socket_create by definition always creates "local" sockets - you cannot reach out to another machine and create a socket there via socket_create. — Marc B
– Marc B, Commented Dec 6, 2012 at 20:27

Nikolai Fetissov · Accepted Answer · 2012-12-06 20:42:37Z

0

Get familiar with socket_select - it allows for waiting on multiple sockets to become readable or/and writable, or have errors. A listening socket becomes readable when there's new connection pending/ready to be accept()-ed.

answered Dec 6, 2012 at 20:42

Nikolai Fetissov

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7 Comments

dorian Over a year ago

ok thanks, i have another question, when i execute this code :

dorian Over a year ago

foreach($this->joueurs as $joueur){ socket_write($joueur->getSocket(),$message,strlen($message)); } while(true){} The client receive the message only when i stop the server, why ??

dorian Over a year ago

Hum can you give a short exemple ? i have to put my client socket in paramter ? i have this error : Warning: fflush(): supplied resource is not a valid stream resource

dorian Over a year ago

i thinking about the fact to use socket_select but it doesn't solved my problem because i can't wait that all socket change them state, for my project i have to read the first socket which change his state and send a response for every socket !!

Nikolai Fetissov Over a year ago

That's your design decision, but think of a state machine - states and events triggering state transitions.

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dorian · Accepted Answer · 2012-12-08 23:17:17Z

0

i found my problem : for unlock socket_read()

socket_set_option($socket,SOL_SOCKET, SO_RCVTIMEO, array("sec"=>1, "usec"=>0));
                socket_set_nonblock($socket);

And for clear buffer i use "/n" without that i could receive message in my client only when the server stop.

answered Dec 8, 2012 at 23:17

dorian

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