php如何统计网站在线人数?本文主要介绍了php实现统计网站在线人数的方法,通过获取服务器端网络参数及文本文件读写实现统计在线人数的功能。希望对大家有所帮助。
具体实现方法如下:
<?php function getIpAddress() { // 取得当前用户的IP地址 if (getenv('HTTP_CLIENT_IP')) { $ip = getenv('HTTP_CLIENT_IP'); } elseif (getenv('HTTP_X_FORWARDED_FOR')) { $ip = getenv('HTTP_X_FORWARDED_FOR'); } elseif (getenv('REMOTE_ADDR')) { $ip = getenv('REMOTE_ADDR'); } else { $ip = $_SERVER['REMOE_ADDR']; } return $ip; } function writeover($filename,$data,$method = 'w',$chmod = 0){ $handle = fopen($filename, $method); !handle && die("文件打开失败"); flock($handle, LOCK_EX); fwrite($handle, $data); flock($handle, LOCK_UN); fclose($handle); $chmod && @chmod($filename, 0777); } function count_online_num($time, $ip) { $fileCount = './count.txt'; $count = 0; $gap = 900; //15分钟不刷新页面就 if (!file_exists($fileCount)) { $str = $time . "\t" . $ip . "\r\n"; writeover($fileCount, $str, 'w', 1); $count = 1; } else { $arr = file($fileCount); $flag = 0; foreach($arr as $key => $val) { $val= trim($val); if ($val != "") { list($when, $seti) = explode("\t", $val); if ($seti ==$ip) { $arr[$key] = $time . "\t" . $seti; $flag = 1; } else { $currentTime = time(); if ($currentTime - $when > 900) { unset($arr[$key]); }else{ $arr[$key]=$val; } } } } if ($flag == 0) { array_push($arr, $time . "\t" . $ip); } $count = count($arr); $str = implode("\r\n", $arr); $str.="\r\n"; writeover($fileCount, $str, 'w', 0); unset($arr); } return $count; } $time = time(); $ip = getIpAddress(); $online_num = count_online_num($time,$ip); echo $online_num; ?>
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