How to use websocket in php (detailed explanation of chat room examples)-PHP Tutorial-php.cn

Home

Backend Development

PHP Tutorial

How to use websocket in php (detailed explanation of chat room examples)

angryTom

Nov 23, 2019 pm 04:38 PM

phpwebsocket

How to use websocket in php (detailed explanation of chat room examples)

在PHP中，开发者需要考虑的东西比较多，从socket的连接、建立、绑定、监听等都需要开发者自己去操作完成，对于初学者来说，难度方面也挺大的，所以本文的思路如下：

1、socket协议的简介

2、介绍client与server之间的连接原理

3、PHP中建立socket的过程讲解

4、用一个聊天室作为实例详细讲解在PHP中如何使用socket

一、socket协议的简介

WebSocket是一个持久化的协议，这是相对于http非持久化来说的。

举个简单的例子，http1.0的生命周期是以request作为界定的，也就是一个request，一个response，对于http来说，本次client与server的会话到此结束；而在http1.1中，稍微有所改进，即添加了keep-alive，也就是在一个http连接中可以进行多个request请求和多个response接受操作。然而在实时通信中，并没有多大的作用，http只能由client发起请求，server才能返回信息，即server不能主动向client推送信息，无法满足实时通信的要求。而WebSocket可以进行持久化连接，即client只需进行一次握手，成功后即可持续进行数据通信，值得关注的是WebSocket实现client与server之间全双工通信，即server端有数据更新时可以主动推送给client端。

二、介绍client与server之间的socket连接原理

1、下面是一个演示client和server之间建立WebSocket连接时握手部分

2、client与server建立socket时握手的会话内容，即request与response

a、client建立WebSocket时向服务器端请求的信息

　　GET /chat HTTP/1.1 
    　　Host: server.example.com 
    　　Upgrade: websocket            //告诉服务器现在发送的是WebSocket协议
    　　Connection: Upgrade 
    　　Sec-WebSocket-Key: x3JJHMbDL1EzLkh9GBhXDw==   //是一个Base64 encode的值，这个是浏览器随机生成的，用于验证服务器端返回数据是否是WebSocket助理
    　　Sec-WebSocket-Protocol: chat, superchat 
    　　Sec-WebSocket-Version: 13 
    　　Origin: http://example.com

b、服务器获取到client请求的信息后，根据WebSocket协议对数据进行处理并返回，其中要对Sec-WebSocket-Key进行加密等操作

　HTTP/1.1 101 Switching Protocols 
　　Upgrade: websocket //依然是固定的，告诉客户端即将升级的是Websocket协议，而不是mozillasocket，lurnarsocket或者shitsocket
　　Connection: Upgrade 
　　Sec-WebSocket-Accept: HSmrc0sMlYUkAGmm5OPpG2HaGWk= //这个则是经过服务器确认，并且加密过后的 Sec-WebSocket-Key,也就是client要求建立WebSocket验证的凭证
　　Sec-WebSocket-Protocol: chat

3、socket建立连接原理图：（推荐学习：PHP视频教程）

三、PHP中建立socket的过程讲解

1、在PHP中，client与server之间建立socket通信，首先在PHP中创建socket并监听端口信息，代码如下：

    //传相应的IP与端口进行创建socket操作
	function WebSocket($address,$port){
		$server = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
		socket_set_option($server, SOL_SOCKET, SO_REUSEADDR, 1);//1表示接受所有的数据包
		socket_bind($server, $address, $port);
		socket_listen($server);
		return $server;
	}

2、设计一个循环挂起WebSocket通道，进行数据的接收、处理和发送

    //对创建的socket循环进行监听，处理数据	
	function run(){
        //死循环，直到socket断开
		while(true){
			$changes=$this->sockets;
			$write=NULL;
			$except=NULL;
            
            /*
            //这个函数是同时接受多个连接的关键，我的理解它是为了阻塞程序继续往下执行。
            socket_select ($sockets, $write = NULL, $except = NULL, NULL);

            $sockets可以理解为一个数组，这个数组中存放的是文件描述符。当它有变化（就是有新消息到或者有客户端连接/断开）时，socket_select函数才会返回，继续往下执行。 
            $write是监听是否有客户端写数据，传入NULL是不关心是否有写变化。 
            $except是$sockets里面要被排除的元素，传入NULL是”监听”全部。 
            最后一个参数是超时时间 
            如果为0：则立即结束 
            如果为n>1: 则最多在n秒后结束，如遇某一个连接有新动态，则提前返回 
            如果为null：如遇某一个连接有新动态，则返回
            */
			socket_select($changes,$write,$except,NULL);
			foreach($changes as $sock){
                
                //如果有新的client连接进来，则
				if($sock==$this->master){

                    //接受一个socket连接
					$client=socket_accept($this->master);

                    //给新连接进来的socket一个唯一的ID
					$key=uniqid();
					$this->sockets[]=$client;  //将新连接进来的socket存进连接池
					$this->users[$key]=array(
						&#39;socket&#39;=>$client,  //记录新连接进来client的socket信息
						&#39;shou&#39;=>false       //标志该socket资源没有完成握手
					);
                //否则1.为client断开socket连接，2.client发送信息
				}else{
					$len=0;
					$buffer=&#39;&#39;;
                    //读取该socket的信息，注意：第二个参数是引用传参即接收数据，第三个参数是接收数据的长度
					do{
						$l=socket_recv($sock,$buf,1000,0);
						$len+=$l;
						$buffer.=$buf;
					}while($l==1000);

                    //根据socket在user池里面查找相应的$k,即健ID
					$k=$this->search($sock);

                    //如果接收的信息长度小于7，则该client的socket为断开连接
					if($len<7){
                        //给该client的socket进行断开操作，并在$this->sockets和$this->users里面进行删除
						$this->send2($k);
						continue;
					}
                    //判断该socket是否已经握手
					if(!$this->users[$k][&#39;shou&#39;]){
                        //如果没有握手，则进行握手处理
						$this->woshou($k,$buffer);
					}else{
                        //走到这里就是该client发送信息了，对接受到的信息进行uncode处理
						$buffer = $this->uncode($buffer,$k);
						if($buffer==false){
							continue;
						}
                        //如果不为空，则进行消息推送操作
						$this->send($k,$buffer);
					}
				}
			}
			
		}
		
	}

3、以上服务器端完成的WebSocket的前期工作后，就等着client连接进行，client创建WebSocket很简单，代码如下：

var ws = new WebSocket("ws://IP:端口");
//握手监听函数
ws.onopen=function(){
     //状态为1证明握手成功，然后把client自定义的名字发送过去
    if(so.readyState==1){
         //握手成功后对服务器发送信息
	 so.send(&#39;type=add&ming=&#39;+n);
    }
}
//错误返回信息函数
ws.onerror = function(){
    console.log("error");
};
//监听服务器端推送的消息
ws.onmessage = function (msg){
    console.log(msg);
}

//断开WebSocket连接
ws.onclose = function(){
    ws = false;
}

四、聊天室实例代码

1、PHP部分

run();

//下面是sock类
class Sock{
	public $sockets; //socket的连接池，即client连接进来的socket标志
	public $users;   //所有client连接进来的信息，包括socket、client名字等
	public $master;  //socket的resource，即前期初始化socket时返回的socket资源
	
	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key
	private $n=array();
	
	public function __construct($address, $port){

        //创建socket并把保存socket资源在$this->master
		$this->master=$this->WebSocket($address, $port);

        //创建socket连接池
		$this->sockets=array($this->master);
	}
	
    //对创建的socket循环进行监听，处理数据	
	function run(){
        //死循环，直到socket断开
		while(true){
			$changes=$this->sockets;
			$write=NULL;
			$except=NULL;
            
            /*
            //这个函数是同时接受多个连接的关键，我的理解它是为了阻塞程序继续往下执行。
            socket_select ($sockets, $write = NULL, $except = NULL, NULL);

            $sockets可以理解为一个数组，这个数组中存放的是文件描述符。当它有变化（就是有新消息到或者有客户端连接/断开）时，socket_select函数才会返回，继续往下执行。 
            $write是监听是否有客户端写数据，传入NULL是不关心是否有写变化。 
            $except是$sockets里面要被排除的元素，传入NULL是”监听”全部。 
            最后一个参数是超时时间 
            如果为0：则立即结束 
            如果为n>1: 则最多在n秒后结束，如遇某一个连接有新动态，则提前返回 
            如果为null：如遇某一个连接有新动态，则返回
            */
			socket_select($changes,$write,$except,NULL);
			foreach($changes as $sock){
                
                //如果有新的client连接进来，则
				if($sock==$this->master){

                    //接受一个socket连接
					$client=socket_accept($this->master);

                    //给新连接进来的socket一个唯一的ID
					$key=uniqid();
					$this->sockets[]=$client;  //将新连接进来的socket存进连接池
					$this->users[$key]=array(
						&#39;socket&#39;=>$client,  //记录新连接进来client的socket信息
						&#39;shou&#39;=>false       //标志该socket资源没有完成握手
					);
                //否则1.为client断开socket连接，2.client发送信息
				}else{
					$len=0;
					$buffer=&#39;&#39;;
                    //读取该socket的信息，注意：第二个参数是引用传参即接收数据，第三个参数是接收数据的长度
					do{
						$l=socket_recv($sock,$buf,1000,0);
						$len+=$l;
						$buffer.=$buf;
					}while($l==1000);

                    //根据socket在user池里面查找相应的$k,即健ID
					$k=$this->search($sock);

                    //如果接收的信息长度小于7，则该client的socket为断开连接
					if($len<7){
                        //给该client的socket进行断开操作，并在$this->sockets和$this->users里面进行删除
						$this->send2($k);
						continue;
					}
                    //判断该socket是否已经握手
					if(!$this->users[$k][&#39;shou&#39;]){
                        //如果没有握手，则进行握手处理
						$this->woshou($k,$buffer);
					}else{
                        //走到这里就是该client发送信息了，对接受到的信息进行uncode处理
						$buffer = $this->uncode($buffer,$k);
						if($buffer==false){
							continue;
						}
                        //如果不为空，则进行消息推送操作
						$this->send($k,$buffer);
					}
				}
			}
			
		}
		
	}
    
    //指定关闭$k对应的socket
	function close($k){
        //断开相应socket
		socket_close($this->users[$k]['socket']);
        //删除相应的user信息
		unset($this->users[$k]);
        //重新定义sockets连接池
		$this->sockets=array($this->master);
		foreach($this->users as $v){
			$this->sockets[]=$v['socket'];
		}
        //输出日志
		$this->e("key:$k close");
	}
    
    //根据sock在users里面查找相应的$k
	function search($sock){
		foreach ($this->users as $k=>$v){
			if($sock==$v['socket'])
			return $k;
		}
		return false;
	}
	
    //传相应的IP与端口进行创建socket操作
	function WebSocket($address,$port){
		$server = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
		socket_set_option($server, SOL_SOCKET, SO_REUSEADDR, 1);//1表示接受所有的数据包
		socket_bind($server, $address, $port);
		socket_listen($server);
		$this->e('Server Started : '.date('Y-m-d H:i:s'));
		$this->e('Listening on   : '.$address.' port '.$port);
		return $server;
	}
	
	
    /*
    * 函数说明：对client的请求进行回应，即握手操作
    * @$k clien的socket对应的健，即每个用户有唯一$k并对应socket
    * @$buffer 接收client请求的所有信息
    */
	function woshou($k,$buffer){

        //截取Sec-WebSocket-Key的值并加密，其中$key后面的一部分258EAFA5-E914-47DA-95CA-C5AB0DC85B11字符串应该是固定的
		$buf  = substr($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));
		
        //按照协议组合信息进行返回
		$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));

        //对已经握手的client做标志
		$this->users[$k]['shou']=true;
		return true;
		
	}
	
    //解码函数
	function uncode($str,$key){
		$mask = array();  
		$data = '';  
		$msg = unpack('H*',$str);
		$head = substr($msg[1],0,2);  
		if ($head == '81' && !isset($this->slen[$key])) {  
			$len=substr($msg[1],2,2);
			$len=hexdec($len);//把十六进制的转换为十进制
			if(substr($msg[1],2,2)=='fe'){
				$len=substr($msg[1],4,4);
				$len=hexdec($len);
				$msg[1]=substr($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;
		}
		
	}
	
    //与uncode相对
	function code($msg){
		$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;  
	}
	
	//用户加入或client发送信息
	function send($k,$msg){
        //将查询字符串解析到第二个参数变量中，以数组的形式保存如：parse_str("name=Bill&age=60",$arr)
		parse_str($msg,$g);
		$ar=array();

		if($g['type']=='add'){
            //第一次进入添加聊天名字，把姓名保存在相应的users里面
			$this->users[$k]['name']=$g['ming'];
			$ar['type']='add';
			$ar['name']=$g['ming'];
			$key='all';
		}else{
            //发送信息行为，其中$g['key']表示面对大家还是个人，是前段传过来的信息
			$ar['nrong']=$g['nr'];
			$key=$g['key'];
		}
        //推送信息
		$this->send1($k,$ar,$key);
	}
	
    //对新加入的client推送已经在线的client
	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socketID $key接受人的 socketID ，根据这个socketID可以查找相应的client进行消息推送，即指定client进行发送
	function send1($k,$ar,$key='all'){
		$ar['code1']=$key;
		$ar['code']=$k;
		$ar['time']=date('m-d H:i:s');
        //对发送信息进行编码处理
		$str = $this->code(json_encode($ar));
        //面对大家即所有在线者发送信息
		if($key=='all'){
			$users=$this->users;
            //如果是add表示新加的client
			if($ar['type']=='add'){
				$ar['type']='madd';
				$ar['users']=$this->getusers();        //取出所有在线者，用于显示在在线用户列表中
				$str1 = $this->code(json_encode($ar)); //单独对新client进行编码处理，数据不一样
                //对新client自己单独发送，因为有些数据是不一样的
				socket_write($users[$k]['socket'],$str1,strlen($str1));
                //上面已经对client自己单独发送的，后面就无需再次发送，故unset
				unset($users[$k]);
			}
            //除了新client外，对其他client进行发送信息。数据量大时，就要考虑延时等问题了
			foreach($users as $v){
				socket_write($v['socket'],$str,strlen($str));
			}
		}else{
            //单独对个人发送信息，即双方聊天
			socket_write($this->users[$k]['socket'],$str,strlen($str));
			socket_write($this->users[$key]['socket'],$str,strlen($str));
		}
	}
	
	//用户退出向所用client推送信息
	function send2($k){
		$this->close($k);
		$ar['type']='rmove';
		$ar['nrong']=$k;
		$this->send1(false,$ar,'all');
	}
    
    //记录日志
	function e($str){
		//$path=dirname(__FILE__).'/log.txt';
		$str=$str."\n";
		//error_log($str,3,$path);
        //编码处理
		echo iconv('utf-8','gbk//IGNORE',$str);
	}
}
?>

2、client部分

<!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>
<p id="ltian">
	<p id="us" class="jb"></p>
	<p id="ct"></p>
    <a href="javascript:;" class="qp" onClick="this.parentNode.children[1].innerHTML=&#39;&#39;">清屏</a>
</p>
<p class="rin">
    <button id="sd">发送</button>
    <span><img  src="/static/imghwm/default1.png"  data-src="http://www.yxsss.com/ui/sk/t.png"  class="lazy"   title="表情" id="imgbq" alt="How to use websocket in php (detailed explanation of chat room examples)" ><img  src="/static/imghwm/default1.png"  data-src="http://www.yxsss.com/ui/sk/e.png"  class="lazy"   title="上传图片" alt="How to use websocket in php (detailed explanation of chat room examples)" ><form><input type="file" title="上传图片" id="upimg"></form></span>
    <p><input id="nrong"></p>
</p>
<p id="ems"><p></p><p class="tc"></p></p>
<script>
if(typeof(WebSocket)==&#39;undefined&#39;){
	alert(&#39;你的浏览器不支持 WebSocket ，推荐使用Google Chrome 或者 Mozilla Firefox&#39;);	
}
</script>
<script src="http://www.yxsss.com/ui/p/a.js" type="text/javascript"></script>
<script>
(function(){
	var key=&#39;all&#39;,mkey;
	var users={};
	var url=&#39;ws://127.0.0.1:8000&#39;;
	var so=false,n=false;
	var lus=A.$(&#39;us&#39;),lct=A.$(&#39;ct&#39;);
	function st(){
		n=prompt(&#39;请给自己取一个响亮的名字：&#39;);
		n=n.substr(0,16);
		if(!n){
			return ;	
		}
        //创建socket，注意URL的格式：ws://ip:端口
		so=new WebSocket(url);
        //握手监听函数
		so.onopen=function(){
            //状态为1证明握手成功，然后把client自定义的名字发送过去
			if(so.readyState==1){
				so.send(&#39;type=add&ming=&#39;+n);
			}
		}
	    
        //握手失败或者其他原因连接socket失败，则清除so对象并做相应提示操作
		so.onclose=function(){
			so=false;
			lct.appendChild(A.$$(&#39;<p class="c2">退出聊天室</p>&#39;));
		}
		
        //数据接收监听，接收服务器推送过来的信息，返回的数据给msg，然后进行显示
		so.onmessage=function(msg){
			eval(&#39;var da=&#39;+msg.data);
			var obj=false,c=false;
			if(da.type==&#39;add&#39;){
				var obj=A.$$(&#39;<p>&#39;+da.name+&#39;</p>&#39;);
				lus.appendChild(obj);
				cuser(obj,da.code);
				obj=A.$$(&#39;<p><span>[&#39;+da.time+&#39;]</span>欢迎<a>&#39;+da.name+&#39;</a>加入</p>&#39;);
				c=da.code;
			}else if(da.type==&#39;madd&#39;){
				mkey=da.code;
				da.users.unshift({&#39;code&#39;:&#39;all&#39;,&#39;name&#39;:&#39;大家&#39;});
				for(var i=0;i<da.users.length;i++){
					var obj=A.$$(&#39;<p>&#39;+da.users[i].name+&#39;</p>&#39;);
					lus.appendChild(obj);
					if(mkey!=da.users[i].code){
						cuser(obj,da.users[i].code);
					}else{
						obj.className=&#39;my&#39;;
						document.title=da.users[i].name;
					}
				}
				obj=A.$$(&#39;<p><span>[&#39;+da.time+&#39;]</span>欢迎&#39;+da.name+&#39;加入</p>&#39;);
				users.all.className=&#39;ck&#39;;
			}
			
			if(obj==false){
				if(da.type==&#39;rmove&#39;){
					var obj=A.$$(&#39;<p class="c2"><span>[&#39;+da.time+&#39;]</span>&#39;+users[da.nrong].innerHTML+&#39;退出聊天室</p>&#39;);
					lct.appendChild(obj);
					users[da.nrong].del();
					delete users[da.nrong];
				}else{
					da.nrong=da.nrong.replace(/{\\(\d+)}/g,function(a,b){
						return &#39;<img  src="/static/imghwm/default1.png"  data-src="sk/&#39;+b+&#39;.gif"  class="lazy"   alt="How to use websocket in php (detailed explanation of chat room examples)" >&#39;;
					}).replace(/^data\:image\/png;base64\,.{50,}$/i,function(a){
						return &#39;<img  src="/static/imghwm/default1.png"  data-src="&#39;+a+&#39;"  class="lazy"   alt="How to use websocket in php (detailed explanation of chat room examples)" >&#39;;
					});
					//da.code 发信息人的code
					if(da.code1==mkey){
						obj=A.$$(&#39;<p class="c3"><span>[&#39;+da.time+&#39;]</span><a>&#39;+users[da.code].innerHTML+&#39;</a>对我说：&#39;+da.nrong+&#39;</p>&#39;);
						c=da.code;
					}else if(da.code==mkey){
						if(da.code1!=&#39;all&#39;)
						obj=A.$$(&#39;<p class="c3"><span>[&#39;+da.time+&#39;]</span>我对<a>&#39;+users[da.code1].innerHTML+&#39;</a>说：&#39;+da.nrong+&#39;</p>&#39;);
						else
						obj=A.$$(&#39;<p><span>[&#39;+da.time+&#39;]</span>我对<a>&#39;+users[da.code1].innerHTML+&#39;</a>说：&#39;+da.nrong+&#39;</p>&#39;);
						c=da.code1;
					}else if(da.code==false){
						obj=A.$$(&#39;<p><span>[&#39;+da.time+&#39;]</span>&#39;+da.nrong+&#39;</p>&#39;);
					}else if(da.code1){
						obj=A.$$(&#39;<p><span>[&#39;+da.time+&#39;]</span><a>&#39;+users[da.code].innerHTML+&#39;</a>对&#39;+users[da.code1].innerHTML+&#39;说：&#39;+da.nrong+&#39;</p>&#39;);
						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.$(&#39;sd&#39;).onclick=function(){
		if(!so){
			 return st();
		}
		var da=A.$(&#39;nrong&#39;).value.trim();
		if(da==&#39;&#39;){
			alert(&#39;内容不能为空&#39;);
			return false;	
		}
		A.$(&#39;nrong&#39;).value=&#39;&#39;;
		so.send(&#39;nr=&#39;+esc(da)+&#39;&key=&#39;+key);
	}
	A.$(&#39;nrong&#39;).onkeydown=function(e){
		var e=e||event;
		if(e.keyCode==13){
			A.$(&#39;sd&#39;).onclick();
		}
	}
	function esc(da){
		da=da.replace(/</g,&#39;<&#39;).replace(/>/g,&#39;>&#39;).replace(/\"/g,&#39;"&#39;);
		return encodeURIComponent(da);
	}
	function cuser(t,code){
		users[code]=t;
		t.onclick=function(){
			t.parentNode.children.rcss(&#39;ck&#39;,&#39;&#39;);
			t.rcss(&#39;&#39;,&#39;ck&#39;);
			key=code;
		}
	}
	A.$(&#39;ltian&#39;).style.height=(document.documentElement.clientHeight - 70)+&#39;px&#39;;
	st();
	

	var bq=A.$(&#39;imgbq&#39;),ems=A.$(&#39;ems&#39;);
	var l=80,r=4,c=5,s=0,p=Math.ceil(l/(r*c));
	var pt=&#39;sk/&#39;;
	bq.onclick=function(e){
		var e=e||event;
		if(!so){
			 return st();
		}
		ems.style.display=&#39;block&#39;;
		document.onclick=function(){
			gb();	
		}
		ct();
		try{e.stopPropagation();}catch(o){}
	}
	
	for(var i=0;i<p;i++){
		var a=A.$$(&#39;<a href="javascript:;">&#39;+(i+1)+&#39;</a>&#39;);
		ems.children[1].appendChild(a);
		ef(a,i);
	}
	ems.children[1].children[0].className=&#39;ck&#39;;
	
	function ct(){
		var wz=bq.weiz();
		with(ems.style){
			top=wz.y-242+&#39;px&#39;;
			left=wz.x+bq.offsetWidth-235+&#39;px&#39;;
		}
	}
		
	function ef(t,i){
		t.onclick=function(e){
			var e=e||event;
			s=i*r*c;
			ems.children[0].innerHTML=&#39;&#39;;
			hh();
			this.parentNode.children.rcss(&#39;ck&#39;,&#39;&#39;);
			this.rcss(&#39;&#39;,&#39;ck&#39;);
			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.$$(&#39;<img  src="/static/imghwm/default1.png"  data-src="&#39;+pt+i+&#39;.gif"  class="lazy"   alt="How to use websocket in php (detailed explanation of chat room examples)" >&#39;);
			hh1(a,i);
			ems.children[0].appendChild(a);
		}
		ct();
	}
	
	function hh1(t,i){
		t.onclick=function(e){
			var e=e||event;
			A.$(&#39;nrong&#39;).value+=&#39;{\\&#39;+i+&#39;}&#39;;
			if(!e.ctrlKey){
				gb();
			}
			try{e.stopPropagation();}catch(o){}
		}
	}
	
	function gb(){
		ems.style.display=&#39;&#39;;
		A.$(&#39;nrong&#39;).focus();
		document.onclick=&#39;&#39;;
	}
	hh();
	A.on(window,&#39;resize&#39;,function(){
		A.$(&#39;ltian&#39;).style.height=(document.documentElement.clientHeight - 70)+&#39;px&#39;;
		ct();
	})	

	var fimg=A.$(&#39;upimg&#39;);
	var img=new Image();
	var dw=400,dh=300;
	A.on(fimg,&#39;change&#39;,function(ev){
		if(!so){
			st();
			return false;
		}
		if(key==&#39;all&#39;){
			alert(&#39;由于资源限制 发图只能私聊&#39;);
			return false;	
		}
		var f=ev.target.files[0];
		if(f.type.match(&#39;image.*&#39;)){
			var r = new FileReader();
			r.onload = function(e){
				img.setAttribute(&#39;src&#39;,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.$$(&#39;canvas&#39;);
		var ct = rc.getContext(&#39;2d&#39;);
		rc.width=iw;
		rc.height=ih;
		ct.drawImage(img,0,0,iw,ih);
		var da=rc.toDataURL();
		so.send(&#39;nr=&#39;+esc(da)+&#39;&key=&#39;+key);
	}
	
})();
</script>
</body>
</html>

The above is the detailed content of How to use websocket in php (detailed explanation of chat room examples). For more information, please follow other related articles on the PHP Chinese website!

Statement

The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

PHP in Action: Real-World Examples and ApplicationsApr 14, 2025 am 12:19 AM

PHP is widely used in e-commerce, content management systems and API development. 1) E-commerce: used for shopping cart function and payment processing. 2) Content management system: used for dynamic content generation and user management. 3) API development: used for RESTful API development and API security. Through performance optimization and best practices, the efficiency and maintainability of PHP applications are improved.

PHP: Creating Interactive Web Content with EaseApr 14, 2025 am 12:15 AM

PHP makes it easy to create interactive web content. 1) Dynamically generate content by embedding HTML and display it in real time based on user input or database data. 2) Process form submission and generate dynamic output to ensure that htmlspecialchars is used to prevent XSS. 3) Use MySQL to create a user registration system, and use password_hash and preprocessing statements to enhance security. Mastering these techniques will improve the efficiency of web development.

PHP and Python: Comparing Two Popular Programming LanguagesApr 14, 2025 am 12:13 AM

PHP and Python each have their own advantages, and choose according to project requirements. 1.PHP is suitable for web development, especially for rapid development and maintenance of websites. 2. Python is suitable for data science, machine learning and artificial intelligence, with concise syntax and suitable for beginners.

The Enduring Relevance of PHP: Is It Still Alive?Apr 14, 2025 am 12:12 AM

PHP is still dynamic and still occupies an important position in the field of modern programming. 1) PHP's simplicity and powerful community support make it widely used in web development; 2) Its flexibility and stability make it outstanding in handling web forms, database operations and file processing; 3) PHP is constantly evolving and optimizing, suitable for beginners and experienced developers.

PHP's Current Status: A Look at Web Development TrendsApr 13, 2025 am 12:20 AM

PHP remains important in modern web development, especially in content management and e-commerce platforms. 1) PHP has a rich ecosystem and strong framework support, such as Laravel and Symfony. 2) Performance optimization can be achieved through OPcache and Nginx. 3) PHP8.0 introduces JIT compiler to improve performance. 4) Cloud-native applications are deployed through Docker and Kubernetes to improve flexibility and scalability.

PHP vs. Other Languages: A ComparisonApr 13, 2025 am 12:19 AM

PHP is suitable for web development, especially in rapid development and processing dynamic content, but is not good at data science and enterprise-level applications. Compared with Python, PHP has more advantages in web development, but is not as good as Python in the field of data science; compared with Java, PHP performs worse in enterprise-level applications, but is more flexible in web development; compared with JavaScript, PHP is more concise in back-end development, but is not as good as JavaScript in front-end development.

PHP vs. Python: Core Features and FunctionalityApr 13, 2025 am 12:16 AM

PHP and Python each have their own advantages and are suitable for different scenarios. 1.PHP is suitable for web development and provides built-in web servers and rich function libraries. 2. Python is suitable for data science and machine learning, with concise syntax and a powerful standard library. When choosing, it should be decided based on project requirements.

PHP: A Key Language for Web DevelopmentApr 13, 2025 am 12:08 AM

PHP is a scripting language widely used on the server side, especially suitable for web development. 1.PHP can embed HTML, process HTTP requests and responses, and supports a variety of databases. 2.PHP is used to generate dynamic web content, process form data, access databases, etc., with strong community support and open source resources. 3. PHP is an interpreted language, and the execution process includes lexical analysis, grammatical analysis, compilation and execution. 4.PHP can be combined with MySQL for advanced applications such as user registration systems. 5. When debugging PHP, you can use functions such as error_reporting() and var_dump(). 6. Optimize PHP code to use caching mechanisms, optimize database queries and use built-in functions. 7

See all articles