php中cookie实现二级域名可访问操作实例

setcookie("hzhuti",$s,time()+3600*12,'/','*.www.phprm.com');

setcookie("hzhuti",$s,time()+3600*12,'/','.www.phprm.com');

setcookie("hzhuti",$s,time()+3600*12,'/','www.phprm.com');

setcookie("hzhuti",$s,time()+3600*12,'/','ss.www.phprm.com');

/**
* php cookie类
* class：PHP_COOKIE
*/
class PHP_COOKIE
{
var $_name = "";
var $_val = array();
var $_expires;
var $_dir = '/';// all dirs
var $_site = '';

function PHP_COOKIE($cname, $cexpires="", $cdir="/", $csite="")
{
$this->_name=$cname;

if($cexpires){
$this->_expires=$cexpires;
}
else{
$this->_expires=time() + 60*60*24*30*12; // ~12 months
}

$this->_dir=$cdir;
$this->_site=$csite;
$this->_val=array();
$this->extract();
}

function extract($cname="")
{
if(!isset($_COOKIE)){
global $_COOKIE;
$_COOKIE=$GLOBALS["HTTP_COOKIE_VARS"];
}

if(empty($cname) && isset($this)){
$cname=$this->_name;
}

if(!empty($_COOKIE[$cname])){

if(get_magic_quotes_gpc()){
$_COOKIE[$cname]=stripslashes($_COOKIE[$cname]);
}
$arr=unserialize($_COOKIE[$cname]);

if($arr!==false && is_array($arr)){

foreach($arr as $var => $val){

$_COOKIE[$var]=$val;

if(isset($GLOBALS["PHP_SELF"])){
$GLOBALS[$var]=$val;
}
}
}

if(isset($this)) $this->_val=$arr;

}
// 在全局范围内移除cookie
unset($_COOKIE[$cname]);
unset($GLOBALS[$cname]);
}

function put($var, $value)
{
$_COOKIE[$var]=$value;
$this->_val["$var"]=$value;

if(isset($GLOBALS["PHP_SELF"])){
$GLOBALS[$var]=$value;
}

if(empty($value)){
unset($this->_val[$var]);
}

}

function clear()
{
$this->_val=array();
}

function set()
{
if(empty($this->_val)){
$cookie_val="";
}
else {
$cookie_val=serialize($this->_val);
}

if(strlen($cookie_val)>4*1024){
trigger_error("The cookie $this->_name exceeds the specification for the maximum cookie size. Some data may be lost", E_USER_WARNING);
}
setcookie("$this->_name", $cookie_val, $this->_expires, $this->_dir, $this->_site);
}
}
?>