setcookie(
'pageVisits',//cookie名字，必需的
$visited,//cookie的值
time()+7*24*60*60,//过期时间,设置为一个星期
'/',//cookie可用的文件路径
'demo.tutorialzine.com' //cookie绑定的域名
)

$visits = (int)$_COOKIE['pageVisits']+1;
echo "You visited this site: ".$visits." times";

setcookie(
'pageVisits',
$visited,
time()-7*24*60*60,//设置为前一个星期，cookie将会被删除
'/',
'demo.tutorialzine.com'
)

$(document).ready(function(){ // Setting a kittens cookie,it will be lost on browser restart:
$.cookie("kittens","Seven Kittens"); // Setting demoCookie (as seen in the demonstration):
$.cookie("demoCookie",text,{expires: 7,path: '/',domain: 'demo.tutorialzine.com'}); // "text" is a variable holding the string to be saved
});

$(document).ready(function(){ // Getting the kittens cookie:
var str = $.cookie("kittens"); // str now contains "Seven Kittens"
});

$(document).ready(function(){ // Deleting the kittens cookie:
var str = $.cookie("kittens",null); // No more kittens
});

PHP
// Always set cookies before any data or HTML are printed to the page
$visited = (int)$_COOKIE['pageVisits'] + 1;
setcookie('pageVisits',// Name of the cookie,required
$visited,// The value of the cookie
time()+7*24*60*60,// Expiration time,set for a week in the future
'/',// Folder path,the cookie will be available for all scripts in every folder of the site
'demo.tutorialzine.com');// Domain to which the cookie will be locked
?>






$(document).ready(function(){var cookie = $.cookie('demoCookie');// If the cookie has been set in a prevIoUs page load,show it in the div directly:
if(cookie) $('.jq-text').text(cookie).show();
$('.fields a').click(function(e){
var text = $('#inputBox').val();// Setting a cookie with a seven day validity:
$.cookie('demoCookie',domain: 'demo.tutorialzine.com'});$('.jq-text').text(text).slideDown('slow');e.preventDefault();
});$('#form1').submit(function(e){ e.preventDefault(); })
})
// -->

MicroTut: Getting And Setting Cookies With jQuery & PHP

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/**
* Cookie plugin
*
* Copyright (c) 2006 Klaus Hartl (stilbuero.de)
* Dual licensed under the MIT and GPL licenses:
* http://www.opensource.org/licenses/mit-license.PHP
* http://www.gnu.org/licenses/gpl.html
*
*/
/**
* Create a cookie with the given name and value and other optional parameters.
*
* @example $.cookie('the_cookie','the_value');
* @desc Set the value of a cookie.
* @example $.cookie('the_cookie','the_value',{ expires: 7,domain: 'jquery.com',secure: true });
* @desc Create a cookie with all available options.
* @example $.cookie('the_cookie','the_value');
* @desc Create a session cookie.
* @example $.cookie('the_cookie',null);
* @desc Delete a cookie by passing null as value. Keep in mind that you have to use the same path and domain
* used when the cookie was set.
*
* @param String name The name of the cookie.
* @param String value The value of the cookie.
* @param Object options An object literal containing key/value pairs to provide optional cookie attributes.
* @option Number|Date expires Either an integer specifying the expiration date from now on in days or a Date object.
* If a negative value is specified (e.g. a date in the past),the cookie will be deleted.
* If set to null or omitted,the cookie will be a session cookie and will not be retained
* when the the browser exits.
* @option String path The value of the path atribute of the cookie (default: path of page that created the cookie).
* @option String domain The value of the domain attribute of the cookie (default: domain of page that created the cookie).
* @option Boolean secure If true,the secure attribute of the cookie will be set and the cookie transmission will
* require a secure protocol (like HTTPS).
* @type undefined
*
* @name $.cookie
* @cat Plugins/Cookie
* @author Klaus Hartl/klaus.hartl@stilbuero.de
*/
/**
* Get the value of a cookie with the given name.
*
* @example $.cookie('the_cookie');
* @desc Get the value of a cookie.
*
* @param String name The name of the cookie.
* @return The value of the cookie.
* @type String
*
* @name $.cookie
* @cat Plugins/Cookie
* @author Klaus Hartl/klaus.hartl@stilbuero.de
*/
jQuery.cookie = function(name,value,options) {
if (typeof value != 'undefined') { // name and value given,set cookie
options = options || {};
if (value === null) {
value = '';
options.expires = -1;
}
var expires = '';
if (options.expires && (typeof options.expires == 'number' || options.expires.toUTCString)) {
var date;
if (typeof options.expires == 'number') {
date = new Date();
date.setTime(date.getTime() + (options.expires * 24 * 60 * 60 * 1000));
} else {
date = options.expires;
}
expires = '; expires=' + date.toUTCString(); // use expires attribute,max-age is not supported by IE
}
// CAUTION: Needed to parenthesize options.path and options.domain
// in the following expressions,otherwise they evaluate to undefined
// in the packed version for some reason...
var path = options.path ? '; path=' + (options.path) : '';
var domain = options.domain ? '; domain=' + (options.domain) : '';
var secure = options.secure ? '; secure' : '';
document.cookie = [name,'=',encodeURIComponent(value),expires,path,domain,secure].join('');
} else { // only name given,get cookie
var cookieValue = null;
if (document.cookie && document.cookie != '') {
var cookies = document.cookie.split(';');
for (var i = 0; i < cookies.length; i++) {
var cookie = jQuery.trim(cookies[i]);
// Does this cookie string begin with the name we want?
if (cookie.substring(0,name.length + 1) == (name + '=')) {
cookieValue = decodeURIComponent(cookie.substring(name.length + 1));
break;
}
}
}
return cookieValue;
}
};

*{
margin:0;
padding:0;
}
body{
/* Setting default text color,background and a font stack */
color:#555555;
font-size:0.825em;
background: #fcfcfc;
font-family:Arial,Helvetica,sans-serif;
}
.section{
margin:0 auto 60px;
text-align:center;
width:600px;
}
.counter{
color:#79CEF1;
font-size:180px;
}
.jq-text{
display:none;
color:#79CEF1;
font-size:80px;
}
p{
font-size:11px;
padding:0 200px;
}
form{
margin-bottom:15px;
}
input[type=text]{
border:1px solid #BBBBBB;
color:#444444;
font-family:Arial,Verdana,sans-serif;
font-size:14px;
letter-spacing:1px;
padding:2px 4px;
}
/* The styles below are only necessary for the styling of the demo page: */
h1{
background:#F4F4F4;
border-bottom:1px solid #EEEEEE;
font-size:20px;
font-weight:normal;
margin-bottom:15px;
padding:15px;
text-align:center;
}
h2 {
font-size:12px;
font-weight:normal;
padding-right:40px;
position:relative;
right:0;
text-align:right;
text-transform:uppercase;
top:-48px;
}
a,a:visited {
color:#0196e3;
text-decoration:none;
outline:none;
}
a:hover{
text-decoration:underline;
}
.clear{
clear:both;
}
h1,h2,p.tutInfo{
font-family:"Myriad Pro",Arial,sans-serif;
}