Php cookies enable second-level domain names to access operational instances

Sometimes two domain names may be on different servers, but we still hope that the second-level domain name can smoothly access the cookie of the primary domain name, and the primary domain name can smoothly access the cookie of the second-level domain name. For example, bbs.www.111cn.net wants to access cookies of www.111cn.net and blog.www.111cn.net.
The following describes three global cookie settings that you may hear

The code is as follows:	Copy code
Setcookie ("hzhui", $ s, time () + 3600*12, '/', '* .www.111cn.net ');

* No. A cookie cannot be set successfully.

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Setcookie ("hzhui", $ s, time () + 3600*12, '/', '.www.111cn.net ');

A global cookie ss.www.111cn.net is successfully set and can be correctly read.

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Setcookie ("hzhui", $ s, time () + 3600*12, '/', 'www .111cn.net ');

A global cookie ss.www.111cn.net is successfully set and can be correctly read.

In this way, Yue Xiaosheng understands that only www.111cn.net can read data. Yue Xiaosheng is successfully tested in FireFox. IE succeeded

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Setcookie ("hzhui", $ s, time () + 3600*12, '/', 'SS .www.111cn.net ');

Set a cookie that can be correctly read only under the ss.www.111cn.net domain name

The standard statement on the network is .www.111cn.net.

There are also '*' statements (This statement is completely incorrect ...)

We recommend a good php cookie operation class, which can set, retrieve, and delete cookies.

 

The code is as follows:

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<? Php /** * Php cookie * 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; } // Remove the cookie globally 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 );   } } ?>