本文实例讲述了PHP简单实现记录网站访问量功能。分享给大家供大家参考，具体如下：

tongji/index.php文件：

$file = dirname(__FILE__).'/tongji.db';

//$data = unserialize(file_get_contents($file));

$fp=fopen($file,'r+');

$content='';

if (flock($fp,LOCK_EX)){

while (($buffer=fgets($fp,1024))!=false){

$content=$content.$buffer;

}

$data=unserialize($content);

//设置记录键值

$total = 'total';

$month = date('Ym');

$today = date('Ymd');

$yesterday = date('Ymd',strtotime("-1 day"));

$tongji = array();

// 总访问增加

$tongji[$total] = $data[$total] + 1;

// 本月访问量增加

$tongji[$month] = $data[$month] + 1;

// 今日访问增加

$tongji[$today] = $data[$today] + 1;

//保持昨天访问

$tongji[$yesterday] = $data[$yesterday];

//保存统计数据

ftruncate($fp,0); // 将文件截断到给定的长度

rewind($fp); // 倒回文件指针的位置

fwrite($fp, serialize($tongji));

flock($fp,LOCK_UN);

fclose($fp);

//输出数据

$total = $tongji[$total];

$month = $tongji[$month];

$today = $tongji[$today];

$yesterday = $tongji[$yesterday]?$tongji[$yesterday]:0;

echo "document.write('访总问 {$total}, 本月 {$month}, 昨日 {$yesterday}, 今日 {$today}');";

}

使用方法(通过js引入tongji/index.php文件)：

运行结果：