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

[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