关于PHP中websocket使用的详细注解

服务端：

<?php//send用户加入//send1发送信息//send2退出登录error_reporting(E_ALL ^ E_NOTICE);ob_implicit_flush();//file_put_contents('lz.text','123', FILE_APPEND);$sk=new Sock('127.0.0.1',8000);$sk->run();class Sock{public $sockets;public $users;public $master;private $sda=array();//已接收的数据private $slen=array();//数据总长度private $sjen=array();//接收数据的长度private $ar=array();//加密keyprivate $n=array();public function __construct($address, $port){$this->master=$this->WebSocket($address, $port);//resource(2, Socket)   //服务器监听var_dump("master:");var_dump($this->master);$this->sockets=array($this->master);//array (size=1) 0 => resource(2, Socket) 。运行两个php还是这样//var_dump($this->sockets);//file_put_contents('lz.text',var_dump($this->sockets), FILE_APPEND);}function run(){while(true){$changes=$this->sockets;//$changes由多变1,但$this->sockets却只是稳定的+1;$write=NULL;$except=NULL;//1.运行select()系统调用在给定阵列插座与指定的超时//2.没有接收到数据就会一直处于阻塞状态,//3.若没有client过来,直阻塞进程,直到有client访问,返回1。//4.此时返回的changes,不是曾经的changes。虽然还只是一条记录,但已经不是服务器而是客户端    /*select的特殊作用：！！！！！！！ 初始为array(0=>resource(2, Socket)) 1,初始状态返回为array(0=>resource(2, Socket))。但socket_accept可以得到resource(3, Socket) 2,初始状态返回为array(0=>resource(2, Socket),1=>resource(3,Socket))。   客户来的客户为resource(3,Socket)。则返回的数据为resource(3,Socket).!!!*/var_dump($changes);$rr=socket_select($changes,$write,$except,NULL);var_dump($changes);var_dump("---*---");//exit;/*file_put_contents('lz.text',json_encode($changes), FILE_APPEND);file_put_contents('lz.text','-----', FILE_APPEND);*/foreach($changes as $sock){//连接主机的client//$this->master永远是 resource(2, Socket)。相当于一个缓存。两种情况,1:为空,使进程阻塞。2：存刚接收的client。if($sock==$this->master){ //---此处只用来存数据了//在socket套接字已创建使用socket_create()，必将与socket_bind()名字，告诉听连接socket_listen()，这个函数将接受传入的连接，插座。//一旦成功连接，将返回一个!!新的套接字资源！！，该资源可用于通信。如果套接字上有多个连接，则第一个将被使用。//如果没有挂起的连接，socket_accept()将阻塞直到连接成为现在。如果使用了非阻塞套接字已socket_set_blocking()或socket_set_nonblock()，错误将返回。//返回socket_accept()插座资源不得用于接受新的连接。原来的听插座插座，但是,仍然是开放的，可以重复使用。 $client=socket_accept($this->master); //resource(3, Socket)。表示接受请求,并创建一个子链接!!   //var_dump($client);//exit;$key=uniqid();$this->sockets[]=$client;$this->users[$key]=array(   'socket'=>$client,'shou'=>false);/*array (size=1)  '57d607085f92a' =>    //$keyarray (size=2)  'socket' => resource(3, Socket) //$socket的表现都一样,只有通过$key区分  'shou' => boolean false    *///file_put_contents('lz.text',json_encode($this->users), FILE_APPEND);}else{ //---此处服务器与客户端发信息$len=0;$buffer='';do{/* int socket_recv ( resource socket, string &buf, int len, int flags )resource socket 是生成的套接字string &buf 是接收缓冲区int len 是你打算接收的长度int flags 是一个标志0x1 数据应该带外发送，所谓带外数据就是TCP紧急数据0x2 使有用的数据复制到缓冲区内，但并不从系统缓冲区内删除。0x4 不要将包路由出去。以上三项与sock.h文件中定义完全相同0x8 数据完整记录0x100 数据完整处理*/$l=socket_recv($sock,$buf,1000,0);//原来取数据是一个缓慢的过程,要一次一次取数据,并计算每次buf的长度,让总长度不超过设定值//var_dump($l);//exit;//file_put_contents('lz.text','socket_recv', FILE_APPEND);$len+=$l;$buffer.=$buf;}while($l==1000);$k=$this->search($sock);//跟据sock返回key值if($len<7){ //发过来的消息太短了,系统就判断 断了,断掉链接。$this->send2($k);//用户退出。1关闭这个$key值对应的socket、删除这条key记录。将sockets数组对象重新排列。                           //2continue;}if(!$this->users[$k]['shou']){//判断用户的握手字段是true？否则重新握手。$this->woshou($k,$buffer);//file_put_contents('lz.text','woshou', FILE_APPEND);}else{  //如果用户已经握手,则与用户之间进行通信。终于可以发消息了！$buffer = $this->uncode($buffer,$k); //返编译if($buffer==false){continue;}//var_dump($bufffer);//exit;$this->send($k,$buffer);}}}}}function close($k){socket_close($this->users[$k]['socket']);unset($this->users[$k]);$this->sockets=array($this->master);foreach($this->users as $v){$this->sockets[]=$v['socket'];}$this->e("key:$k close");}function search($sock){foreach ($this->users as $k=>$v){if($sock==$v['socket'])return $k;}return false;}function WebSocket($address,$port){ //服务器监听//创建并返回一个套接字resource，也称作一个通讯节点。一个典型的网络连接由 2 个套接字构成，一个运行在客户端，另一个运行在服务器端。 //协议，类型，具体协议$server = socket_create(AF_INET, SOCK_STREAM, SOL_TCP); //resource(2, Socket)//file_put_contents('lz.text',$server, FILE_APPEND);//supplied resource is not a valid stream resource        //返回bool.套接字resource,协议级别,可用的socket选项,值。$r=socket_set_option($server, SOL_SOCKET, SO_REUSEADDR, 1);//boolean true//绑定 address 到 socket。 该操作必须是在使用 socket_connect() 或者 socket_listen() 建立一个连接之前。 $r2=socket_bind($server, $address, $port);//boolean true//在socket套接字已创建使用socket_create()定界与socket_bind()名称，它可以告诉听套接字传入的连接.$r3=socket_listen($server);//boolean true$this->e('Server Started : '.date('Y-m-d H:i:s'));$this->e('Listening on   : '.$address.' port '.$port);return $server;}function woshou($k,$buffer){//对接收到的buffer处理,并回馈握手！！$buf  = substr($buffer,strpos($buffer,'Sec-WebSocket-Key:')+18);$key  = trim(substr($buf,0,strpos($buf,"\r\n")));$new_key = base64_encode(sha1($key."258EAFA5-E914-47DA-95CA-C5AB0DC85B11",true));$new_message = "HTTP/1.1 101 Switching Protocols\r\n";$new_message .= "Upgrade: websocket\r\n";$new_message .= "Sec-WebSocket-Version: 13\r\n";$new_message .= "Connection: Upgrade\r\n";$new_message .= "Sec-WebSocket-Accept: " . $new_key . "\r\n\r\n";socket_write($this->users[$k]['socket'],$new_message,strlen($new_message));//sokcet,buffer(缓冲区),长度$this->users[$k]['shou']=true;return true;}function uncode($str,$key){  //返编译$mask = array();  $data = '';  $msg = unpack('H*',$str);//unpack() 函数从二进制字符串对数据进行解包。$head = substr($msg[1],0,2);  if ($head == '81' && !isset($this->slen[$key])) {  $len=substr($msg[1],2,2);$len=hexdec($len);if(substr($msg[1],2,2)=='fe'){$len=substr($msg[1],4,4);$len=hexdec($len);//hexdec() 函数把十六进制转换为十进制。$msg[1]=substr($msg[1],4);}else if(substr($msg[1],2,2)=='ff'){$len=substr($msg[1],4,16);$len=hexdec($len);$msg[1]=substr($msg[1],16);}$mask[] = hexdec(substr($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));$s = 12;$n=0;}else if($this->slen[$key] > 0){$len=$this->slen[$key];$mask=$this->ar[$key];$n=$this->n[$key];$s = 0;}$e = strlen($msg[1])-2;for ($i=$s; $i<= $e; $i+= 2) {  $data .= chr($mask[$n%4]^hexdec(substr($msg[1],$i,2)));  $n++;  }  $dlen=strlen($data);if($len > 255 && $len > $dlen+intval($this->sjen[$key])){$this->ar[$key]=$mask;$this->slen[$key]=$len;$this->sjen[$key]=$dlen+intval($this->sjen[$key]);$this->sda[$key]=$this->sda[$key].$data;$this->n[$key]=$n;return false;}else{unset($this->ar[$key],$this->slen[$key],$this->sjen[$key],$this->n[$key]);$data=$this->sda[$key].$data;unset($this->sda[$key]);return $data;}}function code($msg){  //编译$frame = array();  $frame[0] = '81';  $len = strlen($msg);if($len < 126){$frame[1] = $len<16?'0'.dechex($len):dechex($len);}else if($len < 65025){$s=dechex($len);$frame[1]='7e'.str_repeat('0',4-strlen($s)).$s;}else{$s=dechex($len);$frame[1]='7f'.str_repeat('0',16-strlen($s)).$s;}$frame[2] = $this->ord_hex($msg);  $data = implode('',$frame);  return pack("H*", $data);  }function ord_hex($data)  {  $msg = '';  $l = strlen($data);  for ($i= 0; $i<$l; $i++) {  $msg .= dechex(ord($data{$i}));  }  return $msg;  }//用户加入function send($k,$msg){parse_str($msg,$g);//把查询字符串解析到变量中$ar=array();if($g['type']=='add'){$this->users[$k]['name']=$g['ming'];$ar['type']='add';$ar['name']=$g['ming'];$key='all';}else{$ar['nrong']=$g['nr'];$key=$g['key'];}$this->send1($k,$ar,$key);}function getusers(){$ar=array();foreach($this->users as $k=>$v){$ar[]=array('code'=>$k,'name'=>$v['name']);}return $ar;}//$k 发信息人的code $key接受人的 codefunction send1($k,$ar,$key='all'){$ar['code1']=$key;$ar['code']=$k;$ar['time']=date('m-d H:i:s');$str = $this->code(json_encode($ar));if($key=='all'){$users=$this->users;if($ar['type']=='add'){$ar['type']='madd';$ar['users']=$this->getusers();$str1 = $this->code(json_encode($ar));socket_write($users[$k]['socket'],$str1,strlen($str1));//发送者unset($users[$k]);}foreach($users as $v){socket_write($v['socket'],$str,strlen($str));//接收者}}else{socket_write($this->users[$k]['socket'],$str,strlen($str));//发送者socket_write($this->users[$key]['socket'],$str,strlen($str));//接收者}}//用户退出function send2($k){$this->close($k);$ar['type']='rmove';$ar['nrong']=$k;$this->send1(false,$ar,'all');}function e($str){//$path=dirname(__FILE__).'/log.txt';$str=$str."\n";//error_log($str,3,$path);echo iconv('utf-8','gbk//IGNORE',$str);}}?>

客户端：

<!doctype html><html><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no"/><title>HTML5 websocket 网页聊天室 javascript php</title><style type="text/css">body,p{margin:0px; padding:0px; font-size:14px; color:#333; font-family:Arial, Helvetica, sans-serif;}#ltian,.rin{width:98%; margin:5px auto;}#ltian{border:1px #ccc solid;overflow-y:auto; overflow-x:hidden; position:relative;}#ct{margin-right:111px; height:100%;overflow-y:auto;overflow-x: hidden;}#us{width:110px; overflow-y:auto; overflow-x:hidden; float:right; border-left:1px #ccc solid; height:100%; background-color:#F1F1F1;}#us p{padding:3px 5px; color:#08C; line-height:20px; height:20px; cursor:pointer; overflow:hidden; white-space:nowrap; text-overflow:ellipsis;}#us p:hover,#us p:active,#us p.ck{background-color:#069; color:#FFF;}#us p.my:hover,#us p.my:active,#us p.my{color:#333;background-color:transparent;}button{float:right; width:80px; height:35px; font-size:18px;}input{width:100%; height:30px; padding:2px; line-height:20px; outline:none; border:solid 1px #CCC;}.rin p{margin-right:160px;}.rin span{float:right; padding:6px 5px 0px 5px; position:relative;}.rin span img{margin:0px 3px; cursor:pointer;}.rin span form{position:absolute; width:25px; height:25px; overflow:hidden; opacity:0; top:5px; right:5px;}.rin span input{width:180px; height:25px; margin-left:-160px; cursor:pointer}#ct p{padding:5px; line-height:20px;}#ct a{color:#069; cursor:pointer;}#ct span{color:#999; margin-right:10px;}.c2{color:#999;}.c3{background-color:#DBE9EC; padding:5px;}.qp{position:absolute; font-size:12px; color:#666; top:5px; right:130px; text-decoration:none; color:#069;}#ems{position:absolute; z-index:5; display:none; top:0px; left:0px; max-width:230px; background-color:#F1F1F1; border:solid 1px #CCC; padding:5px;}#ems img{width:44px; height:44px; border:solid 1px #FFF; cursor:pointer;}#ems img:hover,#ems img:active{border-color:#A4B7E3;}#ems a{color:#069; border-radius:2px; display:inline-block; margin:2px 5px; padding:1px 8px; text-decoration:none; background-color:#D5DFFD;}#ems a:hover,#ems a:active,#ems a.ck{color:#FFF; background-color:#069;}.tc{text-align:center; margin-top:5px;}</style></head><body><div id="ltian"><div id="us" class="jb"></div><div id="ct"></div>    <a href="javascript:;" class="qp" onClick="this.parentNode.children[1].innerHTML=''">清屏</a></div><div class="rin">    <button id="sd">发送</button>    <span><img src="http://www.yxsss.com/ui/sk/t.png" title="表情" id="imgbq"><img src="http://www.yxsss.com/ui/sk/e.png" title="上传图片"><form><input type="file" title="上传图片" id="upimg"></form></span>    <p><input id="nrong"></p></div><div id="ems"><p></p><p class="tc"></p></div><script>if(typeof(WebSocket)=='undefined'){alert('你的浏览器不支持 WebSocket ，推荐使用Google Chrome 或者 Mozilla Firefox');}</script><script src="http://www.yxsss.com/ui/p/a.js" type="text/javascript"></script><script>(function(){var key='all',mkey;var users={};var url='ws://127.0.0.1:8000';var so=false,n=false;var lus=A.$('us'),lct=A.$('ct');function st(){n=prompt('请给自己取一个响亮的名字：');n=n.substr(0,16);if(!n){return ;}so=new WebSocket(url);so.onopen=function(){if(so.readyState==1){    alert('888');so.send('type=add&ming='+n);}}so.onclose=function(){so=false;lct.appendChild(A.$$('<p class="c2">退出聊天室</p>'));}so.onmessage=function(msg){eval('var da='+msg.data);var obj=false,c=false;if(da.type=='add'){var obj=A.$$('<p>'+da.name+'</p>');lus.appendChild(obj);cuser(obj,da.code);obj=A.$$('<p><span>['+da.time+']</span>欢迎<a>'+da.name+'</a>加入</p>');c=da.code;}else if(da.type=='madd'){mkey=da.code;da.users.unshift({'code':'all','name':'大家'});for(var i=0;i<da.users.length;i++){var obj=A.$$('<p>'+da.users[i].name+'</p>');lus.appendChild(obj);if(mkey!=da.users[i].code){cuser(obj,da.users[i].code);}else{obj.className='my';document.title=da.users[i].name;}}obj=A.$$('<p><span>['+da.time+']</span>欢迎'+da.name+'加入</p>');users.all.className='ck';}if(obj==false){if(da.type=='rmove'){var obj=A.$$('<p class="c2"><span>['+da.time+']</span>'+users[da.nrong].innerHTML+'退出聊天室</p>');lct.appendChild(obj);users[da.nrong].del();delete users[da.nrong];}else{da.nrong=da.nrong.replace(/{\\(\d+)}/g,function(a,b){return '<img src="sk/'+b+'.gif">';}).replace(/^data\:image\/png;base64\,.{50,}$/i,function(a){return '<img src="'+a+'">';});//da.code 发信息人的codeif(da.code1==mkey){obj=A.$$('<p class="c3"><span>['+da.time+']</span><a>'+users[da.code].innerHTML+'</a>对我说：'+da.nrong+'</p>');c=da.code;}else if(da.code==mkey){if(da.code1!='all')obj=A.$$('<p class="c3"><span>['+da.time+']</span>我对<a>'+users[da.code1].innerHTML+'</a>说：'+da.nrong+'</p>');elseobj=A.$$('<p><span>['+da.time+']</span>我对<a>'+users[da.code1].innerHTML+'</a>说：'+da.nrong+'</p>');c=da.code1;}else if(da.code==false){obj=A.$$('<p><span>['+da.time+']</span>'+da.nrong+'</p>');}else if(da.code1){obj=A.$$('<p><span>['+da.time+']</span><a>'+users[da.code].innerHTML+'</a>对'+users[da.code1].innerHTML+'说：'+da.nrong+'</p>');c=da.code;}}}if(c){obj.children[1].onclick=function(){users[c].onclick();}}lct.appendChild(obj);lct.scrollTop=Math.max(0,lct.scrollHeight-lct.offsetHeight);}}A.$('sd').onclick=function(){if(!so){ return st();}var da=A.$('nrong').value.trim();if(da==''){alert('内容不能为空');return false;}A.$('nrong').value='';so.send('nr='+esc(da)+'&key='+key);}A.$('nrong').onkeydown=function(e){var e=e||event;if(e.keyCode==13){A.$('sd').onclick();}}function esc(da){da=da.replace(/</g,'<').replace(/>/g,'>').replace(/\"/g,'"');return encodeURIComponent(da);}function cuser(t,code){users[code]=t;t.onclick=function(){t.parentNode.children.rcss('ck','');t.rcss('','ck');key=code;}}A.$('ltian').style.height=(document.documentElement.clientHeight - 70)+'px';st();var bq=A.$('imgbq'),ems=A.$('ems');var l=80,r=4,c=5,s=0,p=Math.ceil(l/(r*c));var pt='sk/';bq.onclick=function(e){var e=e||event;if(!so){ return st();}ems.style.display='block';document.onclick=function(){gb();}ct();try{e.stopPropagation();}catch(o){}}for(var i=0;i<p;i++){var a=A.$$('<a href="javascript:;">'+(i+1)+'</a>');ems.children[1].appendChild(a);ef(a,i);}ems.children[1].children[0].className='ck';function ct(){var wz=bq.weiz();with(ems.style){top=wz.y-242+'px';left=wz.x+bq.offsetWidth-235+'px';}}function ef(t,i){t.onclick=function(e){var e=e||event;s=i*r*c;ems.children[0].innerHTML='';hh();this.parentNode.children.rcss('ck','');this.rcss('','ck');try{e.stopPropagation();}catch(o){}}}function hh(){var z=Math.min(l,s+r*c);for(var i=s;i<z;i++){var a=A.$$('<img src="'+pt+i+'.gif">');hh1(a,i);ems.children[0].appendChild(a);}ct();}function hh1(t,i){t.onclick=function(e){var e=e||event;A.$('nrong').value+='{\\'+i+'}';if(!e.ctrlKey){gb();}try{e.stopPropagation();}catch(o){}}}function gb(){ems.style.display='';A.$('nrong').focus();document.onclick='';}hh();A.on(window,'resize',function(){A.$('ltian').style.height=(document.documentElement.clientHeight - 70)+'px';ct();})var fimg=A.$('upimg');var img=new Image();var dw=400,dh=300;A.on(fimg,'change',function(ev){if(!so){st();return false;}if(key=='all'){alert('由于资源限制 发图只能私聊');return false;}var f=ev.target.files[0];if(f.type.match('image.*')){var r = new FileReader();r.onload = function(e){img.setAttribute('src',e.target.result);    };r.readAsDataURL(f);}});img.onload=function(){ih=img.height,iw=img.width;if(iw/ih > dw/dh && iw > dw){ih=ih/iw*dw;iw=dw;}else if(ih > dh){iw=iw/ih*dh;ih=dh;}var rc = A.$$('canvas');var ct = rc.getContext('2d');rc.width=iw;rc.height=ih;ct.drawImage(img,0,0,iw,ih);var da=rc.toDataURL();so.send('nr='+esc(da)+'&key='+key);}})();</script></body></html>