PHP实现web socket 都是使用框架集成来实现，比如hyperf,swoft,或者是安装swoole 扩展来实现websocket,那么有没有PHP本身就能够实现的呢，答案当然有，Let's go.文章源自菜鸟学院-https://www.cainiaoxueyuan.com/bc/36040.html
函数介绍
服务端文章源自菜鸟学院-https://www.cainiaoxueyuan.com/bc/36040.html
stream_socket_server — Create an Internet or Unix domain server socket文章源自菜鸟学院-https://www.cainiaoxueyuan.com/bc/36040.html
可以帮我创建网络链接句柄，参数如下文章源自菜鸟学院-https://www.cainiaoxueyuan.com/bc/36040.html
stream_socket_server( string
$address, int&$error_code=null, string&$error_message=null, int$flags= STREAM_SERVER_BIND | STREAM_SERVER_LISTEN, ?resource$context=null): resource|false文章源自菜鸟学院-https://www.cainiaoxueyuan.com/bc/36040.html客户端文章源自菜鸟学院-https://www.cainiaoxueyuan.com/bc/36040.html
stream_socket_client — Open Internet or Unix domain socket connection文章源自菜鸟学院-https://www.cainiaoxueyuan.com/bc/36040.html
连接句柄文章源自菜鸟学院-https://www.cainiaoxueyuan.com/bc/36040.html
stream_socket_client( string
$address, int&$error_code=null, string&$error_message=null, ?float$timeout=null, int$flags=STREAM_CLIENT_CONNECT, ?resource$context=null): resource|false文章源自菜鸟学院-https://www.cainiaoxueyuan.com/bc/36040.html
简单运用
//服务端$socket = stream_socket_server("tcp://0.0.0.0:8000", $errno, $errstr);if (!$socket) {echo "$errstr ($errno)<br />\n";} else {while ($conn = stream_socket_accept($socket)) { //循环 等待链接fwrite($conn, 'The local time is ' . date('n/j/Y g:i a') . "\n");//成功链接输出以上内容 大致为：The local time is 3/22/2023 11:13 amfclose($conn); //断开连接}fclose($socket); //断开socket}//客户端$fp = stream_socket_client("tcp://0.0.0.0:8000", $errno, $errstr, 30);if (!$fp) {echo "$errstr ($errno)<br />\n";} else {fwrite($fp, "GET / HTTP/1.0\r\nHost: www.example.com\r\nAccept: */*\r\n\r\n");while (!feof($fp)) {echo fgets($fp, 1024);}fclose($fp);}
上面的事例，只能在服务器之间调用，而且每次链接都会断开，一旦需要使用服务就需要不断的进行连接，不断的进行三次握手很浪费资源，那么能不能实现一个呢，No Code No BB.文章源自菜鸟学院-https://www.cainiaoxueyuan.com/bc/36040.html
JsDemo
// 创建websocketws = new WebSocket("ws://"+domain+"/"+port);// 当socket连接打开时，输入用户名ws.onopen = function(){}; //自定义 连接建立时处理操作，比如IM系统登陆信息操作// 当有消息时根据消息类型显示不同信息ws.onmessage = function(){};// 操作服务端发来的消息ws.onclose = function() {console.log("连接关闭，定时重连");connect();//重新连接};ws.onerror = function() {console.log("出现错误");};
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PHP实现三次握手
$socket = stream_socket_server('tcp://'.$ipServer.':'.$portNumber, $errno, $errstr);while($conn = @stream_socket_accept($socket,$nbSecondsIdle)){$message= fread($conn, 1024);send($conn,$message);//@todo//连接成功，有要保持连接，用来接收客户端发送过来的数据包 这里可以把这个连接$conn 保存在内存当中，通过Select or Swoole 事件去loopfputs ($conn, "OK\n");}function send($socket,$buffer){$Sec_WebSocket_Key = '';if (\preg_match("/Sec-WebSocket-Key: *(.*?)\r\n/i", $buffer, $match)) {$Sec_WebSocket_Key = $match[1];}$new_key = \base64_encode(\sha1($Sec_WebSocket_Key . "258EAFA5-E914-47DA-95CA-C5AB0DC85B11", true));$handshake_message = "HTTP/1.1 101 Switching Protocols\r\n"."Upgrade: websocket\r\n"."Sec-WebSocket-Version: 13\r\n"."Connection: Upgrade\r\n"."Sec-WebSocket-Accept: " . $new_key . "\r\n";$handshake_message .= "\r\n";var_dump($handshake_message);//打印握手信息，然后发送给客户端，建立完整连接//socket_write($socket,$handshake_message);$len = @\fwrite($socket, $handshake_message);return 0;}