How to Update Appache from 2.2.15 to 2.4 and PHP 5.4 to 5.6 or 5.5

[Ayog]

Hello Guys , 

How to Update Appache from 2.2.15 to 2.4 and PHP 5.4 to 5.6 or 5.5 in order to work mpdf 

Minimum Requirement is PHP5.5 

Tried 

yum update or yum upgrade

 
Thanks in Advance

[Ayog]

okay i got the solution here the step to do so

First to Install Remi Repo

# yum update && yum install epel-release
# rpm -Uvh http://rpms.famillecollet.com/enterprise...ease-7.rpm

Now you make sure that remi repository is enabled and all set to install chosen PHP version, to do this open 

nano /etc/yum.repos.d/remi.repo

make sure the line set to enabled=1 as instructed below, in order to install PHP 5.5 or 5.6

[remi]
name=Remi's RPM repository for Enterprise Linux 6 - $basearch
#baseurl=http://rpms.remirepo.net/enterprise/6/remi/$basearch/
mirrorlist=http://rpms.remirepo.net/enterprise/6/remi/mirror
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-remi

Now if you want to install PHP 5.5 or PHP 5.6, just set the line enabled=1 in sections [remi-php55] and [remi-php56] to install as instructed below.

[remi-php55]
name=Remi's PHP 5.5 RPM repository for Enterprise Linux 6 - $basearch
#baseurl=http://rpms.remirepo.net/enterprise/6/php55/$basearch/
mirrorlist=http://rpms.remirepo.net/enterprise/6/php55/mirror
# NOTICE: common dependencies are in "remi-safe"
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-remi

[remi-php56]
name=Remi's PHP 5.6 RPM repository for Enterprise Linux 6 - $basearch
#baseurl=http://rpms.remirepo.net/enterprise/6/php56/$basearch/
mirrorlist=http://rpms.remirepo.net/enterprise/6/php56/mirror
# NOTICE: common dependencies are in "remi-safe"
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-remi

Now 

------ On RHEL/CentOS 7/6 and Fedora 18-21 ------
# yum --enablerepo=remi install php-mysqlnd php-pgsql php-pecl-mongo php-pdo php-pecl-memcache php-pecl-memcached php-gd php-xml php-mbstring php-mcrypt php-pecl-apcu php-cli php-pear