Tp5 session master-slave domain name sharing

it is said that Session can be shared between master and slave domain names,
(two projects, two TP5 frameworks)

domain.com
a.domain.com
b.domain.com

but in the TP5 primary domain name, the Session in the secondary domain name is set to the same domain

Session

so does this master-slave domain name sharing mean different domain names in a project share or can
different domain names share in different projects?

ask for guidance urgently!

Php session thinkphp5

Mar.03,2021

thinkphp5.0 session master-slave domain name sharing or php session master-slave domain name sharing
https://wangshengxian.com/ind.
your situation is acquainted with mine, but in my case, multiple domain names are resolved to the same project, which needs to be distinguished. You can refer to it and pay attention to whether your session prefix prefix configuration is consistent

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MySQL Error : Disk full (/tmp/#sql-temptable-64f5-495728e-207b6.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-495728e-207b6.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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