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<?php
$_COOKIE["counter"]?($c=$_COOKIE["counter"]+1):($c=1);
setCookie("counter",$c,time()+60);
echo "<b>歡迎您第"."<font color=#ff0000>".$c."</font>次訪問cookie</b>";
?>
在這個應用程序中,首先是瀏覽器請求一個資源(這個php頁面) ,發(fā)送下面的HTTP包頭內(nèi)容到服務器:
GET http://localhost/index.php HTTP/1.1
HOST:localhost
Accept:*/*
Accept-language:zh-cn
Accept-Encoding:gzip,deflate
User-Agent:Mozilla/4.0 (compatible;MSIE 6.0;Windows NT 5.1;SV1)
Connection:Keep-Alive
---------------------------------------------------------------------------
現(xiàn)在是動態(tài)網(wǎng)頁程序(index.php)創(chuàng)建了Cookie,那么,服務器會傳輸下面的HTTP報頭內(nèi)容到瀏覽器:
HTTP/1.1 200 OK
Server:Apache/2.2.6 (Win32) php/5.2.6
Date:Fri,23 Mar 2009 23:15:55 GMT
Connection:Keep-Alive
Content-Length:65
Content-Typt:text/html
Set-Cookie:VisitorCount=1; expires=Thr,30-Jul-2010 16:00:00 GMT;domain=localhost;path=/
Cache-control:private
GET http://localhost/index.php HTTP/1.1
---------------------------------------------------------------------------
這將在客戶端保存一個cookie文件,并保存$c變量
當再次請求時,就會將cookie中的數(shù)據(jù)傳給服務器,例如下邊的HTTP請求報頭:
Accept:*/*
Accept-language:zh-cn
Pragma:no-cache
User-Agent:Mozilla/4.0(compatible;MSIE 6.0;Windows NT 5.1; SV1)
Host:localhost
Connection:Keep-Alive
Cookie:VisitorCount=1
php技術(shù):使用cookie實現(xiàn)統(tǒng)計訪問者登陸次數(shù),轉(zhuǎn)載需保留來源!
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