here's how you can implement timeouts with the socket functions.
this example works for blocking sockets but will work for both blocking and nonblocking with minor modifications. first call to connect in nonblocking mode returns 115 EINPROGRESS, additional calls return 114 EALREADY if the connection has not already failed or succeeded. once the connection succeeds, the socket resource will be returned.
<?
$host = "127.0.0.1";
$port = "80";
$timeout = 15; //timeout in seconds
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP)
or die("Unable to create socket\n");
socket_set_nonblock($socket)
or die("Unable to set nonblock on socket\n");
$time = time();
while (!@socket_connect($socket, $host, $port))
{
$err = socket_last_error($socket);
if ($err == 115 || $err == 114)
{
if ((time() - $time) >= $timeout)
{
socket_close($socket);
die("Connection timed out.\n");
}
sleep(1);
continue;
}
die(socket_strerror($err) . "\n");
}
socket_set_block($this->socket)
or die("Unable to set block on socket\n");
?>
