php实现socket推送技术的示例

　　在socket出现之前已经有ajax定时请求、长轮询等方案，但都不能满足需求，socket就应用而生了。

　　socket基本函数socket

　　总结下常用的socket函数

　　服务端： socket_create 创建socket设置基本参数

　　 socket_bind 绑定ip和端口号

　　 socket_listen 监听

　　 socket_accept 客户端的连接

　　 socket_read 读取客户端的数据

　　 socket_write 给单独客户端发送数据

　　 socket_close 关闭连接

　　客户端：socket_create 创建socket设置基本参数

　　 socket_connect 连接socket

　　 socket_write 给服务端发送数据

　　 socket_read 读取服务端数据

　　 socket_close 关闭连接

　　H5websocket不多说了，上链接

　　OK，开始贴代码~

　　----------------------------------------------------------分割线

　　服务端代码：

　　 <?php class WS { var $master; var $sockets = array(); var $debug = false;//true为调试模式，输出log日志 var $handshake = array(); function __construct($address, $port){ $this->master=socket_create(AF_INET, SOCK_STREAM, SOL_TCP) or die(socket_create() failed); socket_set_option($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){ $socketArr = $this->sockets; $write = NULL; $except = NULL; socket_select($socketArr, $write, $except, NULL); //自动选择来消息的socket 如果是握手 自动选择主机 foreach ($socketArr as $socket){ if ($socket == $this->master){ //主机 $client = socket_accept($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{ $key = array_search($socket, $this->sockets); if (empty($this->handshake) !isset($this->handshake[$key]) !$this->handshake[$key]){ $this->doHandShake($socket, $buffer, $key); } else{ $buffer = $this->decode($buffer); echo $buffer.PHP_EOL; $key = array_search($socket, $this->sockets); $arr = $this->sockets; array_shift($arr); foreach ($arr as $s){ $this->send($s, $buffer); } } } } } } } function send($client, $msg){ $msg = $this->frame($msg); socket_write($client, $msg, strlen($msg)); } function connect($socket){ array_push($this->sockets, $socket); $this->say(\n . $socket . CONNECTED!); $this->say(date(Y-n-d H:i:s)); } function disConnect($socket){ $index = array_search($socket, $this->sockets); socket_close($socket); $this->say($socket . DISCONNECTED!); if ($index >= 0){ echo unset index is:.PHP_EOL; unset($this->sockets[$index]); } } function doHandShake($socket, $buffer, $handKey){ $this->log(\nRequesting handshake...); $this->log($buffer); list($resource, $host, $origin, $key) = $this->getHeaders($buffer); $this->log(Handshaking...); $upgrade = HTTP/1.1 101 Switching Protocol\r\n . Upgrade: websocket\r\n . Connection: Upgrade\r\n . Sec-WebSocket-Accept: . $this->calcKey($key) . \r\n\r\n; //必须以两个回车结尾 $this->log($upgrade); $sent = socket_write($socket, $upgrade, strlen($upgrade)); $this->handshake[$handKey]=true; $this->log(Done handshaking...); return true; } function getHeaders($req){ $r = $h = $o = $key = null; if (preg_match(/GET (.*) HTTP/ ,$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 = $match[1]; } return array($r, $h, $o, $key); } function calcKey($key){ //基于websocket version 13 $accept = base64_encode(sha1($key . 258EAFA5-E914-47DA-95CA-C5AB0DC85B11, true)); return $accept; } function decode($buffer) { $len = $masks = $data = $decoded = null; $len = ord($buffer[1]) & 127; if ($len === 126) { $masks = substr($buffer, 4, 4); $data = substr($buffer, 8); } else if ($len === 127) { $masks = substr($buffer, 10, 4); $data = substr($buffer, 14); } else { $masks = substr($buffer, 2, 4); $data = substr($buffer, 6); } for ($index = 0; $index < strlen($data); $index++) { $decoded .= $data[$index] ^ $masks[$index % 4]; } return $decoded; } function frame($s){ $a = str_split($s, 125); if (count($a) == 1){ return \x81 . chr(strlen($a[0])) . $a[0]; } $ns = ; foreach ($a as $o){ $ns .= \x81 . chr(strlen($o)) . $o; } return $ns; } function say($msg = ){ echo $msg . \n; } function log($msg = ){ if ($this->debug){ echo $msg . \n; } } } new WS(localhost, 4000);

　　客户端代码（H5）：

　　 <html> <head> <title>demo</title> <script src=握手成功); } ws.onmessage = function(e){ console.log(message: + e.data); } ws.onerror = function(){ console.log(error); } $(#send).click(function(){ content = $(#content).val(); console.log(content); ws.send(content); }) </script> </body> </html>

　　然后执行php demo.php 开启socket（从运维那偷学一招，linux下执行nohup php demo.php &可以在后台执行），浏览器打开多个index.html，就能建立通讯了。

　　代码解析：

　　1.属性$sockets数组保存每个accept连接（不知道这么描述对不对）;

　　2.属性$handshake数组保存连接是否在连接状态;

　　以上这篇php实现socket推送技术的示例就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持脚本之家。