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php中cookie实现二级域名可访问操作的方法

Jun 06, 2016 pm 08:17 PM
cookie php secondary domain operate

这篇文章主要介绍了php中cookie实现二级域名可访问操作的方法,对比了常用的setcookie函数用法,并给出了一个设置cookie的类文件来实现这一功能,是非常实用的技巧,

本文实例讲述了php中cookie实现二级域名可访问操作的方法。分享给大家供大家参考。具体方法如下:

cookie在一些应用中很常用,假设我有一个多级域名要求可以同时访问主域名绑定的cookie,下面就来给大家具体介绍在php中利用setcookie实现二级域名可以成功访问主域名cookie值的方法.

有时候两个域名可能在不同的服务器上,但是我们依然希望二级域名能够顺利访问主域名的cookie,主域名可以顺利访问二级域名的cookie,比如sc.jb51.net 希望能访问 和 blog.jb51.net 的 cookie

下面介绍3种你可能常听到的全局cookie设置方式.

第一种实例代码如下:

复制代码 代码如下:

setcookie("jb51",$s,time()+3600*12,'/','*.jb51.net');

*号无法成功设置一个cookie

第二种实例代码如下:

复制代码 代码如下:

setcookie("jb51",$s,time()+3600*12,'/','.jb51.net');

成功设置一个全局cookie,这样在ss.jb51.net下也能正确读取

第三种实例代码如下:

复制代码 代码如下:

setcookie("jb51",$s,time()+3600*12,'/','jb51.net');

成功设置一个全局cookie,在ss.jb51.net下也能正确读取

这种方式的理解是仅仅jb51.net能够读取,在FireFox下测试成功,IE下测试成功,代码如下:

复制代码 代码如下:

setcookie("jb51",$s,time()+3600*12,'/','ss.jb51.net');

设置一个仅仅在ss.jb51.net域名下可以正确读取的cookie,网络上标准的说法为.jb51.net这样,也有*的说法(该说法完全错误).下面推荐一个不错的php cookie操作的类,,可以设置cookie、获取cookie、删除cookie,代码如下:

复制代码 代码如下:

/** 
* 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(emptyempty($cname) && isset($this)){  
  $cname=$this->_name;  
}  
 
if(!emptyempty($_COOKIE[$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(emptyempty($value)){  
  unset($this->_val[$var]);  

  } 
  function clear()  
  {  
$this->_val=array();  
  } 
  function set()  
  {  
if(emptyempty($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);  
  }  
}  
?>

希望本文所述对大家的PHP程序设计有所帮助。

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