我下载了一个 php 视图计数器并将其设置为数据库，但在显示命中时我遇到了错误。文件说
- 用法：
- 在您的脚本中，使用 reqire_once() 导入此脚本，然后调用
- PHPCount::AddHit(...) 等函数；请参阅每个功能以获取帮助。*
这是我的 demo.php，我想在其中显示视图。但它正在抛出
Notice: Undefined variable: pageID in C:\xampp\htdocs\test\demo.php on line 4
1
<?php
include_once("hit.php");
echo //this is what I added.
PHPCount::AddHit($pageID);
?>
下面是 hit.php，我想知道的是如何在上面的 demo.php 上显示视图？
<?php
/*
* USAGE:
* In your script, use reqire_once() to import this script, then call the
* functions like PHPCount::AddHit(...); See each function for help.
*
* NOTE: You must set the database credentials in the InitDB method.
*/
class PHPCount
{
/*
* Defines how many seconds a hit should be rememberd for. This prevents the
* database from perpetually increasing in size. Thirty days (the default)
* works well. If someone visits a page and comes back in a month, it will be
* counted as another unique hit.
*/
const HIT_OLD_AFTER_SECONDS = 2592000; // default: 30 days.
// Don't count hits from search robots and crawlers.
const IGNORE_SEARCH_BOTS = true;
// Don't count the hit if the browser sends the DNT: 1 header.
const HONOR_DO_NOT_TRACK = false;
private static $IP_IGNORE_LIST = array(
'127.0.0.1',
);
private static $DB = false;
private static function InitDB()
{
if(self::$DB)
return;
try
{
// TODO: Set the database login credentials.
self::$DB = new PDO(
'mysql:host=localhost;dbname=test',
'root', // Username
'', // Password
array(PDO::ATTR_PERSISTENT => true)
);
}
catch(Exception $e)
{
die('Failed to connect to phpcount database');
}
}
/*
* Adds a hit to a page specified by a unique $pageID string.
*/
public static function AddHit($pageID)
{
if(self::IGNORE_SEARCH_BOTS && self::IsSearchBot())
return false;
if(in_array($_SERVER['REMOTE_ADDR'], self::$IP_IGNORE_LIST))
return false;
if(
self::HONOR_DO_NOT_TRACK &&
isset($_SERVER['HTTP_DNT']) && $_SERVER['HTTP_DNT'] == "1"
) {
return false;
}
self::InitDB();
self::Cleanup();
self::CreateCountsIfNotPresent($pageID);
if(self::UniqueHit($pageID))
{
self::CountHit($pageID, true);
self::LogHit($pageID);
}
self::CountHit($pageID, false);
return true;
}
/*
* Returns (int) the amount of hits a page has
* $pageID - the page identifier
* $unique - true if you want unique hit count
*/
public static function GetHits($pageID, $unique = false)
{
self::InitDB();
self::CreateCountsIfNotPresent($pageID);
$q = self::$DB->prepare(
'SELECT hitcount FROM hits
WHERE pageid = :pageid AND isunique = :isunique'
);
$q->bindParam(':pageid', $pageID);
$q->bindParam(':isunique', $unique);
$q->execute();
if(($res = $q->fetch()) !== FALSE)
{
return (int)$res['hitcount'];
}
else
{
die("Missing hit count from database!");
return false;
}
}
/*
* Returns the total amount of hits to the entire website
* When $unique is FALSE, it returns the sum of all non-unique hit counts
* for every page. When $unique is TRUE, it returns the sum of all unique
* hit counts for every page, so the value that's returned IS NOT the
* amount of site-wide unique hits, it is the sum of each page's unique
* hit count.
*/
public static function GetTotalHits($unique = false)
{
self::InitDB();
$q = self::$DB->prepare(
'SELECT hitcount FROM hits WHERE isunique = :isunique'
);
$q->bindParam(':isunique', $unique);
$q->execute();
$rows = $q->fetchAll();
$total = 0;
foreach($rows as $row)
{
$total += (int)$row['hitcount'];
}
return $total;
}
/*====================== PRIVATE METHODS =============================*/
private static function IsSearchBot()
{
// Of course, this is not perfect, but it at least catches the major
// search engines that index most often.
$keywords = array(
'bot',
'spider',
'spyder',
'crawlwer',
'walker',
'search',
'yahoo',
'holmes',
'htdig',
'archive',
'tineye',
'yacy',
'yeti',
);
$agent = strtolower($_SERVER['HTTP_USER_AGENT']);
foreach($keywords as $keyword)
{
if(strpos($agent, $keyword) !== false)
return true;
}
return false;
}
private static function UniqueHit($pageID)
{
$ids_hash = self::IDHash($pageID);
$q = self::$DB->prepare(
'SELECT time FROM nodupes WHERE ids_hash = :ids_hash'
);
$q->bindParam(':ids_hash', $ids_hash);
$q->execute();
if(($res = $q->fetch()) !== false)
{
if($res['time'] > time() - self::HIT_OLD_AFTER_SECONDS)
return false;
else
return true;
}
else
{
return true;
}
}
private static function LogHit($pageID)
{
$ids_hash = self::IDHash($pageID);
$q = self::$DB->prepare(
'SELECT time FROM nodupes WHERE ids_hash = :ids_hash'
);
$q->bindParam(':ids_hash', $ids_hash);
$q->execute();
$curTime = time();
if(($res = $q->fetch()) !== false)
{
$s = self::$DB->prepare(
'UPDATE nodupes SET time = :time WHERE ids_hash = :ids_hash'
);
$s->bindParam(':time', $curTime);
$s->bindParam(':ids_hash', $ids_hash);
$s->execute();
}
else
{
$s = self::$DB->prepare(
'INSERT INTO nodupes (ids_hash, time)
VALUES( :ids_hash, :time )'
);
$s->bindParam(':time', $curTime);
$s->bindParam(':ids_hash', $ids_hash);
$s->execute();
}
}
private static function CountHit($pageID, $unique)
{
$q = self::$DB->prepare(
'UPDATE hits SET hitcount = hitcount + 1 ' .
'WHERE pageid = :pageid AND isunique = :isunique'
);
$q->bindParam(':pageid', $pageID);
$unique = $unique ? '1' : '0';
$q->bindParam(':isunique', $unique);
$q->execute();
}
private static function IDHash($pageID)
{
$visitorID = $_SERVER['REMOTE_ADDR'];
return hash("SHA256", $pageID . $visitorID);
}
private static function CreateCountsIfNotPresent($pageID)
{
// Non-unique
$q = self::$DB->prepare(
'SELECT pageid FROM hits WHERE pageid = :pageid AND isunique = 0'
);
$q->bindParam(':pageid', $pageID);
$q->execute();
if($q->fetch() === false)
{
$s = self::$DB->prepare(
'INSERT INTO hits (pageid, isunique, hitcount)
VALUES (:pageid, 0, 0)'
);
$s->bindParam(':pageid', $pageID);
$s->execute();
}
// Unique
$q = self::$DB->prepare(
'SELECT pageid FROM hits WHERE pageid = :pageid AND isunique = 1'
);
$q->bindParam(':pageid', $pageID);
$q->execute();
if($q->fetch() === false)
{
$s = self::$DB->prepare(
'INSERT INTO hits (pageid, isunique, hitcount)
VALUES (:pageid, 1, 0)'
);
$s->bindParam(':pageid', $pageID);
$s->execute();
}
}
private static function Cleanup()
{
$last_interval = time() - self::HIT_OLD_AFTER_SECONDS;
$q = self::$DB->prepare(
'DELETE FROM nodupes WHERE time < :time'
);
$q->bindParam(':time', $last_interval);
$q->execute();
}
}