php編寫tcp服務器和客戶端程序

這是我從別的地方看到的。

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

2、客戶端程序　SocketClient.php

<?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);
?>

　　3、服務端程序SocketServer.php

<?php 

//確保在連接客戶端時不會超時
set_time_limit(0);
//設置IP和端口號
$address = "127.0.0.1";
$port = 3046;
/**
* 創建一個SOCKET
* AF_INET=是ipv4 如果用ipv6，則參數為 AF_INET6
* SOCK_STREAM為socket的tcp類型，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");
//綁定到socket端口
$result = socket_bind($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
//它接收連接請求並調用一個子連接Socket來處理客戶端和服務器間的信息
$msgsock = socket_accept($sock) or die("socket_accept() failed: reason: " . socket_strerror(socket_last_error()) . "/n");
while(1){
//讀取客戶端數據
echo "Read client data \n";
//socket_read函數會一直讀取客戶端數據,直到遇見\n,\t或者\0字符.PHP腳本把這寫字符看做是輸入的結束符.
$buf = socket_read($msgsock, 8192);
echo "Received msg: $buf \n";

if($buf == "bye"){
//接收到結束消息，關閉連接，等待下一個連接
socket_close($msgsock);
continue;
}

//數據傳送 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);
?>