쉘로 켜셔야 됩니다. 웹페이지용이 아니라서 ㅎ.ㅎ;;;

server.php
#!/usr/bin/php
<?
//-----------------------
class Select{
       var $fhs;
      
       //-----------------------
       function Select(&$fh){
               $this->fhs = array($fh);
       }

       //-----------------------
       function add(&$fh){
               array_push($this->fhs, $fh);
       }

       //-----------------------
       function remove(&$fh){
               for($i = 0; $i < count($this->fhs); $i++){
                       if($this->fhs[$i] == $fh){
                               array_splice($this->fhs, $i, 1);
                               break;
                       }
               }
       }

       //-----------------------
       function can_read($limit = 5){
               $read_fhs = $this->fhs;
               socket_select($read_fhs, $write_fhs = null, $exception_fhs = null, $limit);
               return $read_fhs;
       }

       //-----------------------
       function can_write($limit = 0){
               $write_fhs = $this->fhs;
               socket_select($read_fhs = null, $write_fhs, $exception_fhs = null, $limit);
               return $write_fhs;
       }
}

//-----------------------
class Guest{
       var $fh;
       var $name;

       function Guest($fh, $name){
               $this->fh = $fh;
               $this->name = $name;
       }
}

//-----------------------
class Lobby{
       var $fh;
       var $sel;
       var $guests;

       //-----------------------
       function Lobby(){
               $this->guests = array();
       }
      
       //-----------------------
       function open($addr, $port){
               $this->fh = socket_create(AF_INET, SOCK_STREAM, 0)
                       or die("create error!!n");
               socket_setopt($this->fh, SOL_SOCKET, SO_REUSEADDR, 1)
                       or die("setopt error!!n");
               socket_bind($this->fh, $addr, $port) or die("bind error!!n");
               socket_listen($this->fh, 5) or die("listen error!!n");

               $this->sel = new Select($this->fh);

               print "Wating...";
       }

       //-----------------------
       function close($g){
               socket_close($this->fh);
       }

       //-----------------------
       function work(){
               while(true){
                       foreach($this->sel->can_read() as $fh){
                               if($fh == $this->fh){
                                       //print "Got connection.n";
                                       $new = socket_accept($this->fh)
                                               or die("accept error!!n");
                                       $this->sel->add($new);
                                       socket_write($new, "## 대화명: ##");
                               }
                               else{
                                       $buf = socket_read($fh, 1024);
                                       if($buf){
                                               printf("\n".$g->name.": %s", $buf);
                                               $g = $this->get_guest($fh);
                                               if(! $g){
                                                       $this->add_guest(new Guest($fh, $buf));
                                                       continue;
                                               }

                                               $this->talk2all(sprintf("%s: ", $g->name, $buf));
                                       }
                                       else{
                                               if($this->is_guest($fh))
                                                       {$this->del_guest($fh);}
                                               $this->sel->remove($fh);
                                               socket_close($fh);
                                               print "A client has been removed.n";
                                       }
                               }
                       }
               }
       }

       //-----------------------
       function talk2all($buf){
               foreach($this->guests as $g){
                       socket_write($g->fh, $buf);
               }
       }

       //-----------------------
       function get_guest(&$fh){
               for($i = 0; $i < count($this->guests); $i++){
                       if($fh == $this->guests[$i]->fh){return $this->guests[$i];}
               }
               return null;
       }

       //-----------------------
       function is_guest(&$fh){
               for($i = 0; $i < count($this->guests); $i++){
                       if($fh == $this->guests[$i]->fh){return true;}
               }
               return false;
       }

       //-----------------------
       function add_guest(&$g){
               array_push($this->guests, $g);
               $this->talk2all("## " . $g->name . " has entered. ##n");
               printf("count($this->guests) = %dn", count($this->guests));
       }

       //-----------------------
       function del_guest(&$fh){
               for($i = 0; $i < count($this->guests); $i++){
                       if($fh == $this->guests[$i]->fh){array_splice($this->guests, $i);}
               }
               printf("count($this->guests) = %dn", count($this->guests));
       }
}

//-----------------------
//main
set_time_limit(0);

$lob = new Lobby();
$lob->open("10.0.0.109", 50017);
$lob->work();
?>

c.php
#!/usr/bin/php
<?
set_time_limit(0);

$fh = socket_create(AF_INET, SOCK_STREAM, SOL_TCP)
       or die("create error!!n");
socket_connect($fh, "10.0.0.109", 50017) or die("connect error!!n");

$pid = pcntl_fork();
if($pid == -1){die("could not fork");}

if($pid == 0){
       while(true){
               $in = fopen("php://stdin", "r");
               $line = fgets($in, 255);
               $line = trim($line);
               if($line){socket_write($fh, $line);}
       }
}
else{
       while(true){
               print socket_read($fh, 1024);
       }
}
?>