How to jump with Cookie in PHP?

#How to jump with Cookie in PHP?

If you are in the same domain, the system will automatically carry the cookie. If you want to cross domains, you need to splice it behind the URL. A cookie is a small text data of no more than 4KB, consisting of a name, a Value and several other optional attributes used to control cookie validity, security, and usage scope.

Server-side sending and parsing

The server-side sends Cookie to the client through the HTTP response message. In Set -Cookie settings need to be like cookies sent by the client. The cookie format is as follows:

Set-Cookie: "name=value;domain=.domain.com;path=/;expires=Sat, 11 Jun 2016 11 :29:42 GMT;HttpOnly;secure"

name=value is required, and the others are optional. The main components of a cookie are as follows:

name: a unique cookie name. Generally speaking, cookie names are not case-sensitive.

value: The string value stored in the cookie. It is best to url encode the name and value of the cookie

domain: The domain for which the cookie is valid. All requests sent to this domain will contain this cookie information. This value can include the subdomain (such as:

yq.aliyun.com) or not include it (such as: .aliyun.com, which is valid for all subdomains of aliyun.com).

path: Indicates the path affected by this cookie. The browser will send cookies to the matching path in the specified domain based on this configuration.

expires: Expiration time, a timestamp indicating when the cookie should be deleted (that is, when it should stop sending this cookie to the server). If this timestamp is not set, the browser will delete all cookies when the page is closed; however, you can also set the deletion time yourself. This value is in GMT time format. If the client and server times are inconsistent, there will be a deviation when using expires.

max-age: The same as expires, used to tell the browser how long this cookie will expire (in seconds), rather than a fixed point in time. Under normal circumstances, max-age has a higher priority than expires.

HttpOnly: Informs the browser that it is not allowed to change this value through the script document.cookie, and this value is also not visible in document.cookie. But the http request will still carry this cookie. Note that although this value is not available in the script, it still exists as a file in the browser installation directory. This setting is usually set on the server side.

secure: Security flag, when specified, can only be sent to the server when using an SSL link. If it is an http link, this information will not be passed. Even if the secure attribute is set, it does not mean that others cannot see the cookie information saved locally on your machine, so don't put important information in cookies. Server-side settings

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