you can follow these steps:

1. Update the package manager by running the following command:

sudo yum update

2. Enable the Remi repository by installing the amazon-linux-extras package:

sudo amazon-linux-extras install epel
sudo amazon-linux-extras enable php8.0

3. Install PHP 8.0 and its dependencies by running the following command:

sudo yum install php php-devel php-mysqlnd php-opcache php-xml php-mbstring php-json

4. Verify that PHP 8.0 is installed by running the following command:

php -v

This should display the version of PHP installed on your system.

Note: If you encounter any issues during the installation, you can refer to the official documentation for Amazon Linux 2 or the Remi repository for more information.