Registration and login system in PHP OOPS | PHP PDO & MYSQL with bootstrap | Part 2

Create registration and login system in PHP and OOPS with bootstrap. We are creating a login and registration system in PHP PDO and OOPS concepts. We will use PHP PDO OOPS and Bootstrap 5 to create a login nd registration system.
Part 1 is here -
• Login and registration...
The registration form is used to insert user data into the MYSQL database and the login form is used to authenticate users with username, email, and password.
Source for this tutorial -
technosmarter.com/php/login-a...
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Reference -
Registration and login system in PHP PDO and OOPS with bootstrap | Part 2

[@Sadhnarajsasaram]

Can you make a youtube video downloader like y2mate and will you give its sourslce code pleaseeeeeeeeeeee

[@TechnoSmarter]

Yes . We will create youtube video downloader in future .

[@user-xz9pl2yl7l]

Fatal error: Uncaught Error: Call to a member function prepare() on null in C:\xampp\htdocs\smatr\classes\user.php:72 Stack trace: #0 C:\xampp\htdocs\smatr\signup.php(26): User->validation('', '', '', '', '', '') #1 {main} thrown in C:\xampp\htdocs\smatr\classes\user.php on line 72
please solve this error

[@TechnoSmarter]

You have to check your connection object in configuration file and also you connection credentials.
It should be proper.