You can, for the most part, follow the same instructions for CentOS 8 with a bit of Pre-Setup.

Make sure the AppStream Repo is installed

vi /etc/yum.repos.d/appstream.repo

# paste in
[ol8_latest]
name=Oracle Linux $releasever Latest ($basearch)
baseurl=https://yum.oracle.com/repo/OracleLinux/OL8/appstream/$basearch/
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-oracle
gpgcheck=1
enabled=1

#run dnf update
dnf update

Install/Enable Firewalld

dnf install firewalld
systemctl enable firewalld
systemctl start firewalld

Install PHP

dnf module reset php
dnf module enable php:7.4
dnf -y install php
dnf -y install php-process php-xml php-pecl-apcu php-gd php-intl php-mbstring php-pdo php-soap php-pecl-zip php-mysqlnd

Browser not supported