How to send data via socket from another process?

Question

PHP

The task costs such:
1. I am connected to the server from application.
2. It is necessary from the server to send data to the device via an open socket by pressing a button in the admin panel.

Perhaps the wrong approach.

There is a simple socket server:

set_time_limit(0);

$NULL = NULL;
$address = "127.0.0.1";
$port = 4545;
$max_clients = 10;
$client_sockets = array();
$master = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
$res = true;

$res &= @socket_bind($master, $address, $port);
$res &= @socket_listen($master);

if(!$res)
{
die ("Cannot bind and listen on $address: $port\n");
}

$abortion = false;
$read = array($master);

while(!$abort)
{
$num_changed = socket_select($read, $NULL, $NULL, 0, 10);
/* Did anything change? */
if ($num_changed)
{
/* Did the master socket (new connection) change */
if(in_array($master, $read))
{
if(count($client_sockets) < $max_clients)
{
$client_sockets[]= socket_accept ($master);
echo "Connection accepted (" . count($client_sockets) . " of $max clients)\n";
}
}
/* Loop through all clients, checking for changes in each one */
foreach($client_sockets as $key => $client)
{
/* New data in client socket? Read and answer */
if(in_array($client, $read))
{
$input = socket_read($client, 1024);

if($input === false)
{
socket_shutdown($client);
unset($client_sockets[$key]);
}
else
{
$input = trim($input);

if ([email protected]_write($client, "You said: $input\n") )
{
socket_close($client);
unset ( $client_sockets[$key] ) ;
}
}

if($input == 'exit')
{
socket_shutdown($master);
$abortion = true;
}

}// END IF in_array

} // END FOREACH

} // END IF ($num_changed)

$read = $client_sockets;
$read[] = $master;
} // END WHILE

Can I send data from another script to an open socket?