This article mainly introduces the method of accurately counting the number of online people in PHP. Friends who need it can refer to it.
This is a very accurate method of counting the number of people online through PHP. I want to know how to implement it. Please read patiently.
<?php $filename='online.txt';//数据文件 $cookiename='VGOTCN_OnLineCount';//cookie名称 $onlinetime=600;//在线有效时间,单位:秒 (即600等于10分钟) $online=file($filename); //PHP file() 函数把整个文件读入一个数组中。与 file_get_contents() 类似,不同的是 file() 将文件作为一个数组返回。数组中的每个单元都是文件中相应的一行,包括换行符在内。如果失败,则返回 false $nowtime=$_SERVER['REQUEST_TIME']; $nowonline=array(); //得到仍然有效的数据 foreach($online as $line){ $row=explode('|',$line); $sesstime=trim($row[1]); if(($nowtime - $sesstime)<=$onlinetime){//如果仍在有效时间内,则数据继续保存,否则被放弃不再统计 $nowonline[$row[0]]=$sesstime;//获取在线列表到数组,会话ID为键名,最后通信时间为键值 } } /* @创建访问者通信状态 使用cookie通信 COOKIE 将在关闭浏览器时失效,但如果不关闭浏览器,此 COOKIE 将一直有效,直到程序设置的在线时间超时 */ if(isset($_COOKIE[$cookiename])){//如果有COOKIE即并非初次访问则不添加人数并更新通信时间 $uid=$_COOKIE[$cookiename]; }else{//如果没有COOKIE即是初次访问 $vid=0;//初始化访问者ID do{//给用户一个新ID $vid++; $uid='U'.$vid; }while(array_key_exists($uid,$nowonline)); setcookie($cookiename,$uid); } $nowonline[$uid]=$nowtime;//更新现在的时间状态 //统计现在在线人数 $total_online=count($nowonline); //写入数据 if($fp=@fopen($filename,'w')){ if(flock($fp,LOCK_EX)){ rewind($fp); foreach($nowonline as $fuid=>$ftime){ $fline=$fuid.'|'.$ftime."\n"; @fputs($fp,$fline); } flock($fp,LOCK_UN); fclose($fp); } } echo 'document.write("'.$total_online.'");';
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