How to Use php cross-origin cookie sharing

The domain where machine A is located: a1.main.com. A has an application main. php.
The domain where machine B is located: b1.test.com, and machine B has the application test. php.

1. When setting a cookie in main. php, the cookie setting method is as follows:
Copy codeThe Code is as follows:
Setcookie ("TestCookie", "okol", time () + 3600, "/", "b1.test.com", 1 );

In this way, the cookie can be obtained in test. php.

2. When you enter a url to access test, you must enter a domain name for resolution.
For example, the input: http://b1.test.com/test.php, can get cas in the client set cookie,
Machine B accesses the local application and input http: // localhost: 8080/test. php to obtain the cookie.