socket_connect
I use this script to listen on 3 ports, but with 'netstat -a' in other console reports only the last one is 'LISTEN'.
#!/usr/bin/php -q
<?php
$services = array(
56700 => 'daemon1',
56701 => 'daemon2',
56703 => 'daemon3',
);
// --- Marca el Tiempo Ilimitado para pararse ---
set_time_limit (0);
$sockets = array();
foreach($services as $port => $daemon)
{
// --- Abre el socket ---
if ($sock = @socket_create_listen($port))
{
$sockets[$sock] = $daemon;
}
else
{
echo("error\n");
}
}
print_r($sockets);
while (1)
{
echo "";
}
?>
socket_create_listen
(PHP 4 >= 4.1.0, PHP 5)
socket_create_listen — Opens a socket on port to accept connections
Description
resource socket_create_listen
( int $port
[, int $backlog = 128
] )
socket_create_listen() creates a new socket resource of type AF_INET listening on all local interfaces on the given port waiting for new connections.
This function is meant to ease the task of creating a new socket which only listens to accept new connections.
Parameters
- port
-
The port on which to listen on all interfaces.
- backlog
-
The backlog parameter defines the maximum length the queue of pending connections may grow to. SOMAXCONN may be passed as backlog parameter, see socket_listen() for more information.
Return Values
socket_create_listen() returns a new socket resource on success or FALSE on error. The error code can be retrieved with socket_last_error(). This code may be passed to socket_strerror() to get a textual explanation of the error.
Notes
Note: If you want to create a socket which only listens on a certain interface you need to use socket_create(), socket_bind() and socket_listen().
See Also
- socket_create() - Create a socket (endpoint for communication)
- socket_create_pair() - Creates a pair of indistinguishable sockets and stores them in an array
- socket_bind() - Binds a name to a socket
- socket_listen() - Listens for a connection on a socket
- socket_last_error() - Returns the last error on the socket
- socket_strerror() - Return a string describing a socket error
add a note
User Contributed Notessocket_create_listen
vicente dot lopez at caixadesoft dot es
28-Jul-2009 06:29
28-Jul-2009 06:29
aeolianmeson at ifacfchi dot blitzeclipse dot com
27-Jun-2008 07:34
27-Jun-2008 07:34
I believe that on some systems this may not bind to some or all public interfaces.
On my Windows system, I could not connect on the public interface using this, but could when I made the individual calls to create, bind, and listen.
Dustin Oprea
sysspoof at ng-lab dot org
07-Mar-2008 04:03
07-Mar-2008 04:03
Please note that port 1 to and with 1024 on linux and bsd system require root privileges. So it is recommended to choose a higher port for your own application.
jdittmer at ppp0 dot net
17-Jul-2004 08:42
17-Jul-2004 08:42
If you specify no port number, or 0, a random free port will be chosen.
To use ports for ipc between client/server on the same machine you can use (minus error checking)
server.php:
<?php
$sock = socket_create_listen(0);
socket_getsockname($sock, $addr, $port);
print "Server Listening on $addr:$port\n";
$fp = fopen($port_file, 'w');
fwrite($fp, $port);
fclose($fp);
while($c = socket_accept($sock)) {
/* do something useful */
socket_getpeername($c, $raddr, $rport);
print "Received Connection from $raddr:$rport\n";
}
socket_close($sock);
?>
client.php:
<?php
$fp = fopen($port_file, 'r');
$port = fgets($fp, 1024);
fclose($fp);
$sock = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
socket_connect($sock, '127.0.0.1', $port);
socket_close($sock);
?>