php shares usage methods across domains cookie

a1.main.com, A, main.php, main.php, a1.main.com, A, main.php
b1.test.com, B, test.php, B, test.php

1. When setting cookie in main.php, you can set cookie as follows:

setcookie( "TestCookie",  "okol",  time() + 3600,  "/", "b1.test.com", 1 ); 

cookie is retrieved from test.php.

When accessing test, you must enter the domain name to resolve it.
Such as input: http: / / b1 test. com/test php, can obtain cas cookie Settings on the client,
And access to the application of the machine, machine B input: http: / / localhost: 8080 / test php is not cookie can be obtained.