Typecho网站底部添加页面打开时间、在线人数

1.在functions.php添加以下内容

//在线人数
function online_users() {
    $filename='online.txt'; //数据文件
    $cookiename='Nanlon_OnLineCount'; //Cookie名称
    $onlinetime=30; //在线有效时间
    $online=file($filename); 
    $nowtime=$_SERVER['REQUEST_TIME']; 
    $nowonline=array(); 
    foreach($online as $line){ 
        $row=explode('|',$line); 
        $sesstime=trim($row[1]); 
        if(($nowtime - $sesstime)<=$onlinetime){
            $nowonline[$row[0]]=$sesstime;
        } 
    } 
    if(isset($_COOKIE[$cookiename])){
        $uid=$_COOKIE[$cookiename]; 
    }else{
        $vid=0;
        do{
            $vid++; 
            $uid='U'.$vid; 
        }while(array_key_exists($uid,$nowonline)); 
        setcookie($cookiename,$uid); 
    } 
    $nowonline[$uid]=$nowtime;
    $total_online=count($nowonline); 
    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($fp); 
        } 
    } 
    echo "$total_online"; 
} 

/**
 * 加载时间             以下为添加内容
 * @return bool
 */
function timer_start() {
    global $timestart;
    $mtime     = explode( ' ', microtime() );
    $timestart = $mtime[1] + $mtime[0];
    return true;
}
timer_start();
function timer_stop( $display = 0, $precision = 3) {
    global $timestart, $timeend;
    $mtime     = explode( ' ', microtime() );
    $timeend   = $mtime[1] + $mtime[0];
    $timetotal = number_format( $timeend - $timestart, $precision );
    $r         = $timetotal < 1 ? $timetotal * 1000 . " ms" : $timetotal . " s";
    if ( $display ) {
        echo $r;
    }
    return $r;
}

2.在footer.php添加以下内容

   <span>加载耗时：<?php echo timer_stop();?></span>
   <span>在线人数: <?php echo online_users() ?>人</span>

3.效果如下