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Installing PHP 5.5 on CentOS 6.4
The commands below outline how to install PHP 5.5 on a fresh CentOS 6.4 installation using the Webtatic EL yum repository.
First, you'll need to add the Webtatic EL yum repository
$ rpm -Uvh http://mirror.webtatic.com/yum/el6/latest.rpm
Now, you should be able to install php55w
and php55w-opcache
using yum
$ yum install php55w php55w-opcache
Now restart apache
$ service httpd restart