1、修改php.ini，開啟extension=php_sockets.dll

2、服務端程式SocketServer.php

<?php  
//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 = 3046; 
/** 
 * 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 
*/  
$sock = socket_create(AF_INET, SOCK_STREAM, SOL_TCP) or die("socket_create() fail:" . socket_strerror(socket_last_error()) . "/n");  
//阻塞模式  
socket_set_block($sock) or die("socket_set_block() fail:" . socket_strerror(socket_last_error()) . "/n");  
//繫結到socket埠  
$result = socket_bind($sock, $address, $port) or die("socket_bind() fail:" . socket_strerror(socket_last_error()) . "/n");  
//開始監聽  
$result = socket_listen($sock, 4) or die("socket_listen() fail:" . 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");  
    while(1){
		//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";

		if($buf == "bye"){
			//接收到結束訊息，關閉連線，等待下一個連線
			socket_close($msgsock);
			continue;
		}
		  
		//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");  		
	}  
      
} while (true);  
socket_close($sock);  
?>
 

<?php  
set_time_limit(0);  
  
$host = "127.0.0.1";  
$port = 3046;  
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP)or die("Could not create  socket\n");  
   
$connection = socket_connect($socket, $host, $port) or die("Could not connet server\n"); 
socket_write($socket, "hello socket") or die("Write failed\n");
while ($buff = socket_read($socket, 1024, PHP_NORMAL_READ)) {  
    echo("Response was:" . $buff . "\n");
	echo("input what you want to say to the server:\n");
	$text = fgets(STDIN);
	socket_write($socket, $text);
}  
socket_close($socket);
?>
 

      執行服務端程式：C:\wamp\bin\php\php5.4.16\php.exe C:\wamp\www\SocketServer.php

     執行客戶端程式： C:\wamp\bin\php\php5.4.16\php.exe C:\wamp\www\SocketClient.php

5、其流程與C很相似，實際上就是封裝了C的socket。