Installing PHP 7.3 on Centos 7

Make sure the EPEL repository is installed:

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

Enable PHP 7.3:

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

Install the PHP modules that you need:

yum install php php-common php-cli php-gd php-ldap php-mbstring php-mcrypt php-mysqlnd php-pdo php-pear php-process php-soap php-xml

That’s it!

Source: https://linuxize.com/post/install-php-7-on-centos-7/