首先要說明：這個不是主頁計數器，雖然原理和它相同。                               
一：準備一個計數文件，存放鏈結的url和訪問次數，格式如下                          
id url count                                                                     
id是用來查找的索引號，url為實際文件的地址，count為次數                           
實例數據：                                                                       
doc01 docs/doc01.html 10                                                         
doc02 docs/doc02.html 10                                                         
二：準備count.php文件，代碼如下：                                                
<?php                                                                            
//功能：傳入參數id,在計數文件查找相應的url，增加計數，并返回實際的鏈接           
$countfile="count.txt";                                                          
$lines=file($countfile);//將計數文件內容讀到數組$lines中                         
for($i=0;$i<count($lines);$i++)                                                  
{                                                                                
list($sid, $url, $count)=explode(" ", $lines[$i]);                               
                                        //分解字符串為$id,$url,$count            
if($sid==$id) //查找指定id                                                       
{                                                                                
$count+=1; //增加計數                                                            
$lines[$i]=$sid . " " . $url . " " . "$count" . "\n";//重新生成計數字符串        
break;                                                                           
                                                                                 
}                                                                                
}                                                                                
//寫入計數信息                                                                   
$fp=fopen($countfile, "w");                                                      
for($i=0;$i<count($lines);$i++)                                                  
fputs($fp, $lines[$i]);                                                          
fclose($fp);                                                                     
Header("Location: $url");                                                        
?>                                                                               
注：這個是phpuser.com上的不完全版本，我加了一些改動，現在應該是能用的。          
                                                                                 
三：主頁中超鏈結的調用方式應該改為：                                             
<a href="count.php?id=doc01">doc01</a>                                           
程序功能是：                                                                     
首先將計數文件內容讀到數組中                                                     
再從數組中查找指定id號，如找到則$url為相應的文件的真正鏈接，再將計數加1，        
重新生成計數信息                                                                 
將計數信息寫入文件中                                                             
返回鏈接                                                                         
                                                                                 
四：訪問人數引用就是下面這幾句，寫個function也可以，我偷了把懶，                 
                      誰寫好了給我一個  :)                                       
<?php                                                                            
$countfile="count.txt";                                                          
$lines=file($countfile);                                                         
list($sid,$url,$count) = explode(" ",$lines[0]);//$lines[0]對應count.txt中       
                                                //第一條記錄                     
echo $count;                                                                     
?>