How To Install PHP 7.3 on CentOS 7

Step 1: Add PHP 7.3 Remi repository

sudo yum -y install http://rpms.remirepo.net/enterprise/remi-release-7.rpm 
sudo yum -y install epel-release yum-utils

Step 2: Disable repo for PHP prev version

sudo yum-config-manager --disable remi-php72
sudo yum-config-manager --enable remi-php73

Step 3: Install PHP 7.3 on CentOS 7

sudo yum -y install php php-cli php-fpm php-mysqlnd php-zip php-devel php-gd php-mcrypt php-mbstring php-curl php-xml php-pear php-bcmath php-json

Check version installed

php -v