1. Confirm your currently installed php version:
php -v
2. Install Remi and EPEL data source (warehouse)
rpm -Uvh https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
rpm -Uvh https://rpms.remirepo.net/enterprise/remi-release-7.rpm
3. Enable Remi
vi /etc/yum.repos.d/remi.repo
4. Change the code block of the [remi] area to the following, if the same, no need to change
[remi]
name=Remi's RPM repository for Enterprise Linux 7 - $basearch
#baseurl=http://rpms.remirepo.net/enterprise/7/remi/$basearch/
#mirrorlist=https://rpms.remirepo.net/enterprise/7/remi/httpsmirror
mirrorlist=http://cdn.remirepo.net/enterprise/7/remi/mirror
enabled=0
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-remi
5. Enable Remi PHP7.3 data source
vi /etc/yum.repos.d/remi-php73.repo6.
6. Change the code block of the [remi-php73] area to the following
[remi-php73]
name=Remi's PHP 7.3 RPM repository for Enterprise Linux 7 - $basearch
#baseurl=http://rpms.remirepo.net/enterprise/7/php73/$basearch/
mirrorlist=https://rpms.remirepo.net/enterprise/7/php73/httpsmirror
mirrorlist=http://cdn.remirepo.net/enterprise/7/php73/mirror
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-remi
7. Upgrade php to php7.3
yum -y upgrade php*
8. Check the php version
php -v
If the output is as follows, the update is successful
PHP 7.3.5 (cli) (built: Apr 30 2019 08:37:17) ( NTS )
Copyright (c) 1997-2018 The PHP Group
Zend Engine v3.3.5, Copyright (c) 1998-2018 Zend Technologies
with Zend OPcache v7.3.5, Copyright (c) 1999-2018, by Zend Technologies
9. Restart php-fpm
systemctl restart php-fpm