php怎么结合websocket实现网络聊天

2025-03-12 03:48:51
推荐回答(1个)
回答1:

php有可用的websocket库,不需要php-fpm。
目前比较成熟的有swoole(swoole.com),和workman(workman.net)
swoole是c写的php扩展, 效率比nodejs还要高,workman是纯php实现,两者都号称可以实现并发百万TCP连接。
给你个例子:
这个要通过cmd运行的 具体带的参数有点忘记了
error_reporting(E_ALL);
set_time_limit(0);
ob_implicit_flush();

//创建一个socket连接 设置参数 绑定 监听 并且返回
$master = WebSocket("localhost",12345);

//标示是否已经进行过握手了
$is_shaked = false;

//是否已经关闭
$is_closed = true;

//将socket变为一个可用的socket

while(true){
//如果是关闭状态并且是没有握手的话 则创建一个可用的socket(貌似第二个条件可以去除)
if($is_closed && !$is_shaked){
if(($sock = socket_accept($master)) < 0){
echo "socket_accept() failed: reason: " . socket_strerror($sock) . "\n";
}

//将关闭状态修改为false
$is_closed = false;
}

//开始进行数据处理
process($sock);
}

//处理请求的函数
function process($socket){
//先从获取到全局变量
global $is_closed, $is_shaked;

//从socket中获取数据
$buffer = socket_read($socket,2048);

//如果buffer返回值为false并且已经握手的话 则断开连接
if(!$buffer && $is_shaked){
disconnect($socket);
}else{
//如果没有握手的话则握手 并且修改握手状态
if($is_shaked == false){
$return_str = dohandshake($buffer);
$is_shaked = true;
}else{
//如果已经握手的话则送入deal函数中进行相应处理
$data_str = decode($buffer); //解析出来的从前端送来的内容
console($data_str);
$return_str = encode(deal($socket, $data_str));
//$return_str = encode($data_str);
}

//将应该返回的字符串写入socket返回
socket_write($socket,$return_str,strlen($return_str));
}
}

function deal($socket, $msgObj){
$obj = json_decode($msgObj);
foreach($obj as $key=>$value){
if($key == 'close'){
disconnect($socket);
console('close success');
return 'close success';
}else if($key == 'msg'){
console($value."\n");
return $value;
}
}
}

//获取头部信息
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-Key: (.*)\r\n/",$req,$match)){ $key=$match[1]; }
if(preg_match("/\r\n(.*?)\$/",$req,$match)){ $data=$match[1]; }
return array($r,$h,$o,$key,$data);
}

function WebSocket($address,$port){
$master=socket_create(AF_INET, SOCK_STREAM, SOL_TCP) or die("socket_create() failed");
socket_set_option($master, SOL_SOCKET, SO_REUSEADDR, 1) or die("socket_option() failed");
socket_bind($master, $address, $port) or die("socket_bind() failed");
socket_listen($master,20) or die("socket_listen() failed");
echo "Server Started : ".date('Y-m-d H:i:s')."\n";
echo "Master socket : ".$master."\n";
echo "Listening on : ".$address." port ".$port."\n\n";
return $master;
}

function dohandshake($buffer){
list($resource,$host,$origin,$key,$data) = getheaders($buffer);
echo "resource is $resource\n";
echo "origin is $origin\n";
echo "host is $host\n";
echo "key is $key\n\n";

$response_key = base64_encode(sha1($key.'258EAFA5-E914-47DA-95CA-C5AB0DC85B11', true));

$return_str = "HTTP/1.1 101 Switching Protocols\r\n".
"Upgrade: websocket\r\n".
"Connection: Upgrade\r\n".
"Sec-WebSocket-Accept: $response_key\r\n\r\n";
return $return_str;
}

function console($msg){
$msg = transToGBK($msg);
echo "$msg\n";
return $msg;
}

function decode($msg="") {
$mask = array();
$data = "";
$msg = unpack("H*",$msg);

$head = substr($msg[1],0,2);

if (hexdec($head{1}) === 8){
$data = false;
} else if (hexdec($head{1}) === 1){
$mask[] = hexdec(substr($msg[1],4,2));
$mask[] = hexdec(substr($msg[1],6,2));
$mask[] = hexdec(substr($msg[1],8,2));
$mask[] = hexdec(substr($msg[1],10,2));

$s = 12;
$e = strlen($msg[1])-2;
$n = 0;
for ($i= $s; $i<= $e; $i+= 2){
$data .= chr($mask[$n%4]^hexdec(substr($msg[1],$i,2)));
$n++;
}
}

return $data;
}

function encode($msg=""){
$frame = array();
$frame[0] = "81";
$msg .= ' is ok';
$len = strlen($msg);
$frame[1] = $len<16?"0".dechex($len):dechex($len);
$frame[2] = ord_hex($msg);
$data = implode("",$frame);
return pack("H*", $data);
}

function transToGBK($s){//UTF8->GBK
//echo $s;
return iconv("UTF-8", "GBK", $s);
return $s;
}

function ord_hex($data){
$msg = "";
$l = strlen($data);

for ($i=0; $i<$l; $i++){
//ord是返回字符串第一个字符的ascii值
//dechex把十进制转换为十六进制
$msg .= dechex(ord($data{$i}));
}

return $msg;
}

function disconnect($socket){
global $is_shaked, $is_closed;
$is_shaked = false;
$is_closed = true;
socket_close($socket);
}
?>

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