Setup Apache with Virtual Hosts on RHEL

The Apache HTTP server is a software that runs in the background (daemon), which primary role is to server web pages and other services to applications that connect to it, such as client web browsers. It was first developed to work with Linux/Unix operating systems. Apache has been the world’s most popular web server since the boom of the World Wide Web and open source in the mid 90’s.

This tutorial will walk through setting up two virtual hosts – two websites – on your RHEL6/7 server.
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Setup NPTD Server and client for CENTOS 6

Network Time Protocol is used to synchronize the time on Linux Server. NTP continuously sync and adjusts the time setting of the client by querying the NTP server. It is recommended to be used by systems which need very fine tuned time synchronization requirements (milliseconds). Recommended setup to use is to have a common NTPD server on your LAN and then configure other devices to sync to it.
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Return MySQL query as PHP variable

If you have a PHP built webpage and you need to save the MySQL query as a PHP variable, then you can use the following function.
The MySQL query result should be a single entry and it will be saved on the variable when the function is called.

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Install Mongo and MBString PHP module on RedHat

The following steps walks through the installation of mongo and mbstring modules for php. This is helpful when you are required to install specific versions of the modules along with your PHP package.
Installation on CentOS of php-mbstring is straightforward as you just can get the package from the Epel-repo or on the Optional Packages repo.
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