谈谈php中使用websocket－实例 http://blog.csdn.net/xueling022/article/details/52902358
本来是搜一些html5 websocket资料看的，结果被引去看了php的socket编程。下面是一些简单的例子，在命令行运行php脚本就行
[命令行运行PHP]PHP中有一个php.exe文件，可以用命令执行PHP脚本。如：D:/php.exe -f F:/test.php ; 可以使用php.exe -h查看更多参数 ：
server端：
<?php
/**
* 服务器端代码
*
*/
//确保在连接客户端时不会超时
set_time_limit(0);
//设置IP和端口号
$address = "localhost";
$port = 1234; //调试的时候，可以多换端口来测试程序！
//创建一个SOCKET
if (($sock = socket_create(AF_INET, SOCK_STREAM, SOL_TCP)) === false)
{
echo "socket_create() 失败的原因是:" . socket_strerror(socket_last_error()) . "/n";
die;
}
//阻塞模式
if (socket_set_block($sock) == false)
{
echo "socket_set_block() 失败的原因是:" . socket_strerror(socket_last_error()) . "/n";
die;
}
//绑定到socket端口
if (socket_bind($sock, $address, $port) == false)
{
echo "socket_bind() 失败的原因是:" . socket_strerror(socket_last_error()) . "/n";
die;
}
//开始监听
if (socket_listen($sock, 4) == false)
{
echo "socket_listen() 失败的原因是:" . socket_strerror(socket_last_error()) . "/n";
die;
}
do
{
if (($msgsock = socket_accept($sock)) === false)
{
echo "socket_accept() failed: reason: " . socket_strerror(socket_last_error()) . "/n";
die;
}
//发到客户端
$msg = "welcome /n";
if (socket_write($msgsock, $msg, strlen($msg)) === false)
{
echo "socket_write() failed: reason: " . socket_strerror(socket_last_error()) ."/n";
die;
}
echo "读取客户端发来的信息/n";
$buf = socket_read($msgsock, 8192);
echo "收到的信息: $buf /n";
socket_close($msgsock);
} while (true);
socket_close($sock);
?>client端：
<?php
/**
* 客户端代码
*/
error_reporting(0);
set_time_limit(0);
echo " TCP/IP Connection /n";
$service_port = 10001;
$address = '127.0.0.1';
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
if ($socket === false)
{
die;
}
else
{
echo "OK";
}
echo "试图连接 ";
if (socket_connect($socket, $address, $service_port) == false)
{
$error = socket_strerror(socket_last_error());
echo "socket_connect() failed./n","Reason: {$error} /n";
die;
}
else
{
echo "连接OK/n";
}
$in = "Hello World/r/n";
if (socket_write($socket, $in, strlen($in)) === false)
{
echo "socket_write() failed: reason: " . socket_strerror(socket_last_error()) ."/n";
die;
}
else
{
echo "发送到服务器信息成功！/n","发送的内容为: $in /n";
}
$out = "";
while ($out = socket_read($socket, 8192))
{
echo "接受的内容为: ".$out;
}
echo "关闭SOCKET…/n";
socket_close($socket);
echo "关闭OK/n";
?>再看websocket协议，是HTTP协议升级来的。看其消息头：
所以server端需要解析一下，并返回握手的协议内容：
在网上找到解析的相关代码 phpwebsocket - url: http://code.google.com/p/phpwebsocket/
// Usage: $master=new WebSocket("localhost",12345);
class WebSocket{
var $master;
var $sockets = array();
var $users = array();
var $debug = false;
function __construct($address,$port){
error_reporting(E_ALL);
set_time_limit(0);
ob_implicit_flush();
$this->master=socket_create(AF_INET, SOCK_STREAM, SOL_TCP) or die("socket_create() failed");
socket_set_option($this->master, SOL_SOCKET, SO_REUSEADDR, 1) or die("socket_option() failed");
socket_bind($this->master, $address, $port) or die("socket_bind() failed");
socket_listen($this->master,20) or die("socket_listen() failed");
$this->sockets[] = $this->master;
$this->say("Server Started : ".date('Y-m-d H:i:s'));
$this->say("Listening on : ".$address." port ".$port);
$this->say("Master socket : ".$this->master."/n");
while(true){
$changed = $this->sockets;
socket_select($changed,$write=NULL,$except=NULL,NULL);
foreach($changed as $socket){
if($socket==$this->master){
$client=socket_accept($this->master);
if($client<0){ $this->log("socket_accept() failed"); continue; }
else{ $this->connect($client); }
}
else{
$bytes = @socket_recv($socket,$buffer,2048,0);
if($bytes==0){ $this->disconnect($socket); }
else{
$user = $this->getuserbysocket($socket);
if(!$user->handshake){ $this->dohandshake($user,$buffer); }
else{ $this->process($user,$this->unwrap($buffer)); }
}
}
}
}
}
function process($user,$msg){
/* Extend and modify this method to suit your needs */
/* Basic usage is to echo incoming messages back to client */
$this->send($user->socket,$msg);
}
function send($client,$msg){
$this->say("> ".$msg);
$msg = $this->wrap($msg);
socket_write($client,$msg,strlen($msg));
$this->say("! ".strlen($msg));
}
function connect($socket){
$user = new User();
$user->id = uniqid();
$user->socket = $socket;
array_push($this->users,$user);
array_push($this->sockets,$socket);
$this->log($socket." CONNECTED!");
$this->log(date("d/n/Y ")."at ".date("H:i:s T"));
}
function disconnect($socket){
$found=null;
$n=count($this->users);
for($i=0;$i<$n;$i++){
if($this->users[$i]->socket==$socket){ $found=$i; break; }
}
if(!is_null($found)){ array_splice($this->users,$found,1); }
$index=array_search($socket,$this->sockets);
socket_close($socket);
$this->log($socket." DISCONNECTED!");
if($index>=0){ array_splice($this->sockets,$index,1); }
}
function dohandshake($user,$buffer){
$this->log("/nRequesting handshake...");
$this->log($buffer);
list($resource,$host,$origin,$key1,$key2,$l8b) = $this->getheaders($buffer);
$this->log("Handshaking...");
//$port = explode(":",$host);
//$port = $port[1];
//$this->log($origin."/r/n".$host);
$upgrade = "HTTP/1.1 101 WebSocket Protocol Handshake/r/n" .
"Upgrade: WebSocket/r/n" .
"Connection: Upgrade/r/n" .
//"WebSocket-Origin: " . $origin . "/r/n" .
//"WebSocket-Location: ws://" . $host . $resource . "/r/n" .
"Sec-WebSocket-Origin: " . $origin . "/r/n" .
"Sec-WebSocket-Location: ws://" . $host . $resource . "/r/n" .
//"Sec-WebSocket-Protocol: icbmgame/r/n" . //Client doesn't send this
"/r/n" .
$this->calcKey($key1,$key2,$l8b) . "/r/n";// .
//"/r/n";
socket_write($user->socket,$upgrade.chr(0),strlen($upgrade.chr(0)));
$user->handshake=true;
$this->log($upgrade);
$this->log("Done handshaking...");
return true;
}
function calcKey($key1,$key2,$l8b){
//Get the numbers
preg_match_all('/([/d]+)/', $key1, $key1_num);
preg_match_all('/([/d]+)/', $key2, $key2_num);
//Number crunching [/bad pun]
$this->log("Key1: " . $key1_num = implode($key1_num[0]) );
$this->log("Key2: " . $key2_num = implode($key2_num[0]) );
//Count spaces
preg_match_all('/([ ]+)/', $key1, $key1_spc);
preg_match_all('/([ ]+)/', $key2, $key2_spc);
//How many spaces did it find?
$this->log("Key1 Spaces: " . $key1_spc = strlen(implode($key1_spc[0])) );
$this->log("Key2 Spaces: " . $key2_spc = strlen(implode($key2_spc[0])) );
if($key1_spc==0|$key2_spc==0){ $this->log("Invalid key");return; }
//Some math
$key1_sec = pack("N",$key1_num / $key1_spc); //Get the 32bit secret key, minus the other thing
$key2_sec = pack("N",$key2_num / $key2_spc);
//This needs checking, I'm not completely sure it should be a binary string
return md5($key1_sec.$key2_sec.$l8b,1); //The result, I think
}
function getheaders($req){
$r=$h=$o=null;
if(preg_match("/GET (.*) HTTP/" ,$req,$match)){ $r=$match[1]; }
if(preg_match("/Host: (.*)/r/n/" ,$req,$match)){ $h=$match[1]; }
if(preg_match("/Origin: (.*)/r/n/" ,$req,$match)){ $o=$match[1]; }
if(preg_match("/Sec-WebSocket-Key1: (.*)/r/n/",$req,$match)){ $this->log("Sec Key1: ".$sk1=$match[1]); }
if(preg_match("/Sec-WebSocket-Key2: (.*)/r/n/",$req,$match)){ $this->log("Sec Key2: ".$sk2=$match[1]); }
if($match=substr($req,-8)) { $this->log("Last 8 bytes: ".$l8b=$match); }
return array($r,$h,$o,$sk1,$sk2,$l8b);
}
function getuserbysocket($socket){
$found=null;
foreach($this->users as $user){
if($user->socket==$socket){ $found=$user; break; }
}
return $found;
}
function say($msg=""){ echo $msg."/n"; }
function log($msg=""){ if($this->debug){ echo $msg."/n"; } }
function wrap($msg=""){ return chr(0).$msg.chr(255); }
function unwrap($msg=""){ return substr($msg,1,strlen($msg)-2); }
}
class User{
var $id;
var $socket;
var $handshake;
}继承类：可以自己按需写，这里我添加了几行代码，sendAll()等，很方便就改成了一个即时的网页版聊天室。
// Run from command prompt > php -q chatbot.demo.php
include "websocket.class.php";
// Extended basic WebSocket as ChatBot
class ChatBot extends WebSocket{
function process($user,$msg){
if (isset($user->first)) {
$this->send($user->socket,'');
$user->first = true;
}
$this->say("< ".$msg);
switch($msg){
case "hello" : $this->send($user->socket,"hello human"); break;
case "hi" : $this->send($user->socket,"zup human"); break;
case "name" : $this->send($user->socket,"my name is Multivac, silly I know"); break;
case "age" : $this->send($user->socket,"I am older than time itself"); break;
case "date" : $this->send($user->socket,"today is ".date("Y.m.d")); break;
case "time" : $this->send($user->socket,"server time is ".date("H:i:s")); break;
case "thanks": $this->send($user->socket,"you're welcome"); break;
case "bye" : $this->send($user->socket,"bye"); break;
//default : $this->send($user->socket,$msg." not understood"); break;
default : $this->sendAll($user, $msg); break;
}
}
function sendAll($currentUser, $msg){
$usersList = $this->users;
foreach ($usersList as $user){
if ($user !== $currentUser) // 自己发送的消息就不再接收一次了
$this->send($user->socket, $msg);
}
}
}
$master = new ChatBot("localhost",12345);客户端代码：
<html>
<head>
<title>WebSocket</title>
<style>
html,body{font:normal 0.9em arial,helvetica;}
#log {width:440px; height:200px; border:1px solid #7F9DB9; overflow:auto;}
#msg {width:330px;}
</style>
<script>
var socket;
function init(){
var host = "ws://localhost:12345/websocket/server.php";
try{
socket = new WebSocket(host);
log('WebSocket - status '+socket.readyState);
socket.onopen = function(msg){ log("Welcome - status "+this.readyState); };
socket.onmessage = function(msg){ log("Received: "+msg.data); };
socket.onclose = function(msg){ log("Disconnected - status "+this.readyState); };
}
catch(ex){ log(ex); }
$("msg").focus();
}
function send(){
var txt,msg;
txt = $("msg");
msg = txt.value;
if(!msg){ alert("Message can not be empty"); return; }
txt.value="";
txt.focus();
try{ socket.send(msg); log('Sent: '+msg); } catch(ex){ log(ex); }
}
function quit(){
log("Goodbye!");
socket.close();
socket=null;
}
// Utilities
function $(id){ return document.getElementById(id); }
function log(msg){ $("log").innerHTML+="<br>"+msg; }
function onkey(event){ if(event.keyCode==13){ send(); } }
</script>
</head>
<body onload="init()">
<h3>WebSocket v2.00</h3>
<div id="log"></div>
<input id="msg" type="textbox" onkeypress="onkey(event)"/>
<button onclick="send()">Send</button>
<button onclick="quit()">Quit</button>
<div>Commands: hello, hi, name, age, date, time, thanks, bye</div>
</body>
</html>PS:
* 这个websocket的类文件可能有一点问题，客户端握手后应该接收的第一条信息都丢失了，没细看代码，以后再检查吧。
楼主的文章还是很不错的，不过应用中单进程是死穴，php多进程+WbeSocket可以看下workerman-chat，是用php写的一个WebSocket聊天室，性能很强悍。
这个代码是完全阻塞，不能并行，只维持1个TCP连接没有任何意义。还是用swoole扩展吧，基于epoll/kqueue，可以像Erlang/Golang之类维持上百万TCP连接。
我也写了一篇类似的文章
http://barretlee.com/websocket-with-php/
来源：oschina
链接：https://my.oschina.net/u/105637/blog/338301