# cat /etc/redhat-release
CentOS Linux release 7.7.1908 (Core)

# yum install -y https://rpms.remirepo.net/enterprise/remi-release-7.rpm
... 略

# yum install -y --enablerepo=remi-php74 php which
... 略

# which php
/usr/bin/php

# php -v
PHP 7.4.0 (cli) (built: Nov 26 2019 20:13:36) ( NTS )
Copyright (c) The PHP Group
Zend Engine v3.4.0, Copyright (c) Zend Technologies

# php -i | grep php.ini
Configuration File (php.ini) Path => /etc
Loaded Configuration File => /etc/php.ini

# yum info php
Loaded plugins: fastestmirror, ovl
Loading mirror speeds from cached hostfile
 * base: ftp.riken.jp
 * epel: ftp.riken.jp
 * extras: ftp.riken.jp
 * remi-safe: ftp.riken.jp
 * updates: ftp.riken.jp
Installed Packages
Name        : php
Arch        : x86_64
Version     : 7.4.0
Release     : 1.el7.remi
Size        : 10 M
Repo        : installed
From repo   : remi-php74
Summary     : PHP scripting language for creating dynamic web sites
URL         : http://www.php.net/
License     : PHP and Zend and BSD and MIT and ASL 1.0 and NCSA
Description : PHP is an HTML-embedded scripting language. PHP attempts to make it
            : easy for developers to write dynamically generated web pages. PHP also
            : offers built-in database integration for several commercial and
            : non-commercial database management systems, so writing a
            : database-enabled webpage with PHP is fairly simple. The most common
            : use of PHP coding is probably as a replacement for CGI scripts.
            :
            : The php package contains the module (often referred to as mod_php)
            : which adds support for the PHP language to Apache HTTP Server.