<?php ob_start(); session_start(); $num=0; $dirpt = "online"; $reftime = 1; if (is_dir($dirpt) && $dir = opendir($dirpt)) { while (($file = readdir($dir)) !== false) { if(strcmp($file,"..")==0 || strcmp($file,".")==0){ continue; } $D_[date("Y-m-d H:i:s",filemtime($dirpt."/".$file))]=$file; $num++; unset($cum); } closedir($dir); $filename = session_id(); $fp = fopen($dirpt."/".$filename,"w"); fputs($fp,""); fclose($fp); $ntime = date("Y-m-d H:i:s",mktime(date("H"),date("i")-1,0,date("m"),date("d"),date("Y"))); $D_[$ntime]="-"; krsort($D_); $onlinenumber=0; while(1){ $vkey=key($D_); $onlinenumber++; if(strcmp($ntime,$vkey)==0){ break; }else{ array_shift($D_); } } array_shift($D_); reset($D_); while(count($D_)>0){ $ckey=key($D_); unlink($dirpt."/".$D_[$ckey]); if(!next($D_)){ break; } } }else{ @chmod("..",0777); @mkdir($dirpt,0777); } $online=$onlinenumber-1; $retime=60*$reftime; echo "当前在线<strong><font color=red>$online</font></strong>人<meta http-equiv=refresh content=\"{$retime},url=\">"; ob_end_flush(); ?> <!-- 《利用文件属性结合Session进行在线人数统计》 作者：sports98 编写日期: 2003-3-19 -->
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