Upgrading PHP to new version

im on RHEL 6 with PHP 5.3.3 integrated into apache and mysql. What are the general steps for upgrading php and insuring that apache uses the new version?
Should i de-install php 5.3.3 and then install the new version? Keep in mind im trying to not break apache, wordpress, or mysql. I am not using phpmyadmin though.

The php related items I have are below
php.x86_64 5.3.3-46.el6_6 @rhel-6-server-rpms
php-cli.x86_64 5.3.3-46.el6_6 @rhel-6-server-rpms
php-common.x86_64 5.3.3-46.el6_6 @rhel-6-server-rpms
php-gd.x86_64 5.3.3-46.el6_6 @rhel-6-server-rpms
php-mcrypt.x86_64 5.3.3-4.el6 @epel
php-mysql.x86_64 5.3.3-46.el6_6 @rhel-6-server-rpms
php-pdo.x86_64 5.3.3-46.el6_6 @rhel-6-server-rpms
php-pear.noarch 1:1.9.4-4.el6 @rhel-6-server-rpms
php-pgsql.x86_64 5.3.3-46.el6_6 @rhel-6-server-rpms
php-xml.x86_64 5.3.3-46.el6_6 @rhel-6-server-rpms

2.6.32-573.12.1.el6.x86_64 #1 SMP Mon Nov 23 12:55:32 EST 2015 x86_64 x86_64 x86_64 GNU/Linux