Just enable remi repo as it is described in their instruction and run
# yum update php
I use command 'yum --enablerepo=remi update php' and this appear. As you can see this updates to version 5.4, which is perfect, but also updates the package mysql. Would there be any operating problems with Plesk when updating to these packages? If there were any incompatibility, I'd rather not risk it. Should I proceed?
Package Arquitecture Version Repository Size
============================================================================================================================================================================
Updating:
php x86_64 5.4.45-12.el6.remi remi 2.8 M
Installation for dependencies:
compat-mysql51 x86_64 5.1.54-1.el6.remi remi 1.4 M
libaio x86_64 0.3.107-10.el6 base 21 k
perl-GD x86_64 2.44-3.el6 base 180 k
t1lib x86_64 5.1.2-6.el6_2.1 base 160 k
Updating for dependencies:
mysql x86_64 5.5.54-1.el6.remi remi 5.7 M
mysql-bench x86_64 5.5.54-1.el6.remi remi 420 k
mysql-devel x86_64 5.5.54-1.el6.remi remi 166 k
mysql-libs x86_64 5.5.54-1.el6.remi remi 780 k
mysql-server x86_64 5.5.54-1.el6.remi remi 10 M
php-bcmath x86_64 5.4.45-12.el6.remi remi 69 k
php-cli x86_64 5.4.45-12.el6.remi remi 4.1 M
php-common x86_64 5.4.45-12.el6.remi remi 968 k
php-fpm x86_64 5.4.45-12.el6.remi remi 1.4 M
php-gd x86_64 5.4.45-12.el6.remi remi 152 k
php-imap x86_64 5.4.45-12.el6.remi remi 88 k
php-ldap x86_64 5.4.45-12.el6.remi remi 71 k
php-mbstring x86_64 5.4.45-12.el6.remi remi 954 k
php-mcrypt x86_64 5.4.45-12.el6.remi remi 60 k
php-mssql x86_64 5.4.45-12.el6.remi remi 95 k
php-mysql x86_64 5.4.45-12.el6.remi remi 145 k
php-odbc x86_64 5.4.45-12.el6.remi remi 87 k
php-pdo x86_64 5.4.45-12.el6.remi remi 129 k
php-pecl-apcu x86_64 4.0.11-2.el6.remi.5.4 remi 81 k
php-pecl-igbinary x86_64 2.0.1-1.el6.remi.5.4 remi 41 k
php-pecl-memcache x86_64 3.0.8-2.el6.remi.5.4 remi 100 k
php-pecl-redis x86_64 2.2.8-1.el6.remi.5.4 remi 219 k
php-pgsql x86_64 5.4.45-12.el6.remi remi 122 k
php-soap x86_64 5.4.45-12.el6.remi remi 236 k
php-xml x86_64 5.4.45-12.el6.remi remi 180 k
php-xmlrpc x86_64 5.4.45-12.el6.remi remi 80 k