Step 1 - Check the system OS and Hardware information.
Step 2 - Check the current version of Apache, PHP and MySql.
And also check PHP dependency versions.
Step 3 - Add EPEL and Remi repositories into your server :
On CentOS 6.x 32-bit :
wget http://dl.fedoraproject.org/pub/epel/6/i386/epel-release-6-8.noarch.rpm
wget http://rpms.famillecollet.com/enterprise/remi-release-6.rpm
rpm -Uvh remi-release-6*.rpm epel-release-6*.rpm
On CentOS 6.x x86_64 (64-bit) :
wget http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm
wget http://rpms.famillecollet.com/enterprise/remi-release-6.rpm
rpm -Uvh remi-release-6*.rpm epel-release-6*.rpm
Step 4 - After installing, check the repository is added or not.
Step 5 - Now enable your newly added Remi repository. Open the /etc/yum.repos.d/remi.repo file using a text editor.
Edit enabled=0 line to enabled=1 => Select the version which you want to enable, go to that PHP version and enable 1. Here I am upgrade version php56.
Step 6 -After enabling "php56", we can upgrade php version by using below command.
yum --enablerepo=remi,remi-php56 update php\*
Step 7 - After all we can check the PHP and PHP dependency version.
Step 8 - Now restart the Apache server.
Step 9 - We can also check the version in phpinfo.php file.
That's it...
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