<?php  
/** 
 * File name:client.php 
 * 客戶端程式碼 
 *  
 * @author guisu.huang 
 * @since 2012-04-11 
 */  
set_time_limit(0);  
  
$host = "127.0.0.1";  
$port = 10010;  
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP)or die("Could not create  socket\n"); // 建立一個Socket  
   
$connection = socket_connect($socket, $host, $port) or die("Could not connet server\n");    //  連線  
socket_write($socket, "hello socket") or die("Write failed\n"); // 資料傳送 向伺服器傳送訊息  
while ($buff = socket_read($socket, 1024, PHP_NORMAL_READ)) {  
    echo("Response was:" . $buff . "\n");  
}  
socket_close($socket);  
?>


<?php  
/** 
 * File name server.php 
 * 伺服器端程式碼 
 *  
 * @author guisu.huang 
 * @since 2012-04-11 
 *  
 */  
  
//確保在連線客戶端時不會超時  
set_time_limit(0);  
//設定IP和埠號  
$address = "127.0.0.1";  
$port = 10010; //除錯的時候，可以多換埠來測試程式！  
/** 
 * 建立一個SOCKET  
 * AF_INET=是ipv4 如果用ipv6，則引數為 AF_INET6 
 * SOCK_STREAM為socket的tcp型別，如果是UDP則使用SOCK_DGRAM 
*/  
$sock = socket_create(AF_INET, SOCK_STREAM, SOL_TCP) or die("socket_create() 失敗的原因是:" . socket_strerror(socket_last_error()) . "/n");  
//阻塞模式  
socket_set_block($sock) or die("socket_set_block() 失敗的原因是:" . socket_strerror(socket_last_error()) . "/n");  
//繫結到socket埠  
$result = socket_bind($sock, $address, $port) or die("socket_bind() 失敗的原因是:" . socket_strerror(socket_last_error()) . "/n");  
//開始監聽  
$result = socket_listen($sock, 4) or die("socket_listen() 失敗的原因是:" . socket_strerror(socket_last_error()) . "/n");  
echo "OK\nBinding the socket on $address:$port ... ";  
echo "OK\nNow ready to accept connections.\nListening on the socket ... \n";  
do { // never stop the daemon  
    //它接收連線請求並呼叫一個子連線Socket來處理客戶端和伺服器間的資訊  
    $msgsock = socket_accept($sock) or  die("socket_accept() failed: reason: " . socket_strerror(socket_last_error()) . "/n");  
      
    //讀取客戶端資料  
    echo "Read client data \n";  
    //socket_read函式會一直讀取客戶端資料,直到遇見\n,\t或者\0字元.PHP指令碼把這寫字元看做是輸入的結束符.  
    $buf = socket_read($msgsock, 8192);  
    echo "Received msg: $buf   \n";  
      
    //資料傳送 向客戶端寫入返回結果  
    $msg = "welcome \n";  
    socket_write($msgsock, $msg, strlen($msg)) or die("socket_write() failed: reason: " . socket_strerror(socket_last_error()) ."/n");  
    //一旦輸出被返回到客戶端,父/子socket都應通過socket_close($msgsock)函式來終止  
    socket_close($msgsock);  
} while (true);  
socket_close($sock);  
?>