I want to create multiple users. so that whenever each user login, the user should get his individual page. can you help me?
Sit down with a pen and paper and write down exactly what you want to happen and how you want it to happen. Forget about the PHP code for a second and just in plain english/your native language, think about how you could implement this.
Perhaps in the user table in the database, you can store the page id of the first location they should be redirected to after logging in?
First get a basic login system working, then work on adding the feature you want.
If it's a school assignment, don't be expecting everyone to just give you the code in its entirety. Ask for help, not for code. Give it a go first, then come back with problems.