调用WordPress函数统计文章访问量及PHP原生计数器的实现，
调用WordPress函数统计文章访问量及PHP原生计数器的实现，
1.首先介绍WordPress的两款功能强大的插件：
（1）Count per Day 是一个非常强大的访客数量统计插件，可以统计每天、昨天、每周、每月等等的访客数量（根据IP进行统计），统计在线访客数、浏览器、搜索词等等，自带多种调用简码、模板标签以及小工具，方便你自行调用和集成。
（2）StatPressCN，实时显示blog的访问统计，完美支持中文（如搜索关键字等）。它可以集中显示来访者、爬虫、搜索关键字、订阅统计、浏览器、操 作系统等信息，方便您及时把握blog的访问情况，同时还提供了定制输出、统计权限、信息存储期等个性化设置选项。另外，您可以随时掌握blog被订阅的 情况并把它放在侧栏中显示，还可以获得所有页面（包括post、page、archive以及homepage）被访问的情况，还可以在侧栏中显示 blog中被访问最多的热门文章等。 增加了对中国大陆和港台地区的本地化语言支持（目前支持wp-config.php中设置为zh_CN、zh_HK和zh_TW）。
安装插件的方式固然功能很强大，但是弊端也是显而易见的——容易影响网页加载速度，所以我放弃了这种方式。
2.其次，是简单的几条代码，通过统计网页刷新的次数来记录访客数的，把以下代码放到function.php中：
/* 访问计数 */
function record_visitors()
{
if (is_singular())
{
global $post;
$post_ID = $post->ID;
if($post_ID)
{
$post_views = (int)get_post_meta($post_ID, 'views', true);
if(!update_post_meta($post_ID, 'views', ($post_views+1)))
{
add_post_meta($post_ID, 'views', 1, true);
}
}
}
}
add_action('wp_head', 'record_visitors');
/// 函数名称：post_views
/// 函数作用：取得文章的阅读次数
function post_views($before = '(点击 ', $after = ' 次)', $echo = 1)
{
global $post;
$post_ID = $post->ID;
$views = (int)get_post_meta($post_ID, 'views', true);
if ($echo) echo $before, number_format($views), $after;
else return $views;
}
然后在需要显示的界面，比如footer.php或header.php等页面调用：
<?php post_views(' ', ' 次'); ?>
3.PHP原生实现访问计数器示例：
index.php
<?php
include("counter.php")
?>
<html>
<head>
<title>访问计数器</title>
</head>
<body>
<center>
<h1 id="访问者计数器">访问者计数器</h1>
<U> <!--下划线-->
<font size="6" face="隶书" >你是第</font>
<B>
<font size="9" face="Verdana" color="#ffcc00">
<?php Counter() ?> <!--调用函数-->
</font>
</B>
<font size="6" face="隶书" >个访问者</font>
</U>
</center>
</body>
</html>
counter.php
<?php
//$five,$four 等变量表示零的个数，放在数字前边构成6位
function Counter()
{ //定义函数
$five = "00000"; //声明变量
$four = "0000";
$three = "000";
$two = "00";
$one = "0";
$counter = "record.dat"; //存放访问数的目的文件，.dat格式
if(!file_exists($counter)) //判断文件是否存在
{
$counter = fopen($counter,"w");
fputs($counter,"0"); //写入文件
fclose($counter);
}
else
{
$fp = fopen($counter,"r+");
$num = fgets($fp,"1024"); //如果文件存在则读出文件，并加 1
$num = $num + 1;
if($num < 10)
print "$five"."$num";
elseif($num < 100)
print "$four"."$num";
elseif($num < 1000)
print "$three"."$num";
elseif($num < 10000)
print "$two"."$num";
elseif($num < 100000)
print "$one"."$num";
else
print "$num";
}
$fp = fopen($counter,"w");
fputs($fp,"$num");
fclose($fp);
}
?>
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