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HomeBackend DevelopmentPHP Tutorial聊天室技术(三) -- 在线人数_PHP

聊天室技术(三) -- 在线人数_PHP

Jun 01, 2016 pm 12:34 PM
iflistltVANumber of peopleonlinetechnologychatroom

我根据网易聊天室的在线人数的方法,显示当前的在线人数,代码解释如下:

 

1 登陆时建立在线人名单的数组,放在body后面

//锁定在线人数文件
while(file_exists($useronlinelock)){$pppp++;}
fclose(fopen($useronlinelock,"w"));

//读入在线人名单
$useronline = file($useronline);
unlink($useronlinelock);

//建立数组 list
print("document.writeln("list=new Array(");
$k=count($useronline);
if($k>1)
{
for($i=0;$i<($k-1);$i++)
{
$usercurrent = split($split,$useronline[$i],99);
// 姓名+,
print("'$usercurrent[0]',");
}
$i=$k-1;
// 处理最后一个姓名
$usercurrent = split($split,$useronline[$i],99);
print("'$usercurrent[0]'");
}
// 数组结束
print(")");n");
?>

2显示在线人数的js
document.writeln('[在线人数'+count+']
');
document.writeln("[所有人a>]
");
document.writeln("");
var j,name,club;
for(var i=0;i{
if(list[i]!=null){

//显示每个在线人的名字
document.writeln("
e='"+list[i]+"'>"+list[i]+"
");
}
}
this.r.document.writeln('


');


3改变聊天对象
function cs(name)
{
if(this.d.document==null)return;
if(name=='所有人')
{
this.d.add('所有人');
this.d.document.inputform.talkto.value='所有人';

//改变焦点
this.d.document.inputform.msg.focus();
return;
}
for(var i=0;i{
if(list[i]==name)
{

//更改发送的谈话对象
this.d.document.inputform.talkto.value=list[i];
this.d.document.inputform.msg.focus();
return;
}
}

//错误
alert('此用户已离线或已改了昵称。');
}

4删除一个用户
function del(str)
{
for(var i=0;iif(list[i]==str)
{
delete list[i];
count--;
}
}


5增加一个用户
function add(str1,str2)
{
var l=list.length;
for(var i=0;i

//如果已经在数组里面则返回
if(list[i]==str1)
return;

//增加一个用户
list[l]=str1;
count++;
}

6更新聊天人数的方法,定时器的使用
var timerID=null;
var timerRunning=false;

function stop()
{
//停止
if(timerRunning)clearTimeout(timerID);
timerRunning=false;
}
function start()
{
stop();
//调用更新在线人数的程序
write1();
}

function write1()
{
... ... ... ...
//设定更新时间,
timerID=setTimeout("start()",30000);
timerRunning=true;
}


这种方法比较简单的实现了在线人数的显示,当然也可以使用读入在线人文件的方法显示在线人数,不过在改变聊天对象是会比较麻烦.

原作者:howtodo
来源:php2000.com

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