Tutorials

Virtual machines

An introduction to virtual machines

Virtual machines are extremely practical and versatile: Do you want to set up an isolated test environment, run a Linux application on your Windows computer, or provide different operating systems for cross-platform software tests? With the right virtualization software and an appropriate image file, this is easy. We will introduce you to the basics of hypervisor-supported hardware virtualization...

CodeIgniter: The lean PHP framework

CodeIgniter – The lightweight of the PHP frameworks

CodeIgniter is an open-source PHP framework developed by EllisLab that is currently under the patronage of the British Columbia Institute of Technology. The slim software is based on an MVC architectural structure, offers detailed documentation, and is praised for its performance. We present the makeup, structure, and application flow of the CodeIgniter framework with detailed code examples and...

jQuery tutorial: introduction and first steps

jQuery tutorial: basics on selectors, syntax, and more

By using the JavaScript library, jQuery, you can easily customise HTML elements. Well-known CSS selectors such as the element selector or the .class selector help you to choose the desired content and manipulate it using various actions. In addition, lines of code can be written that respond to how website visitors navigate and what search terms they enter, and then automatically execute...

Prepared statements in PHP/MySQL

Prepared statements in PHP: Basics and examples

In order to improve the performance of repeated SQL queries and also significantly reduce the risk of manipulation in database access, you can take advantage of prepared statements in PHP and other programming languages. But how does this work, and how can you use prepared statements for managing your database systems?

Clearing your RAM

Clearing your RAM: our step-by-step guide

Computers simplify our working life and everyday life in many ways. However, if they do not run as usual, they can become more of a hindrance than a help. The various possible causes of performance problems include excessive memory usage, which plays an important role in managing active processes. One possible solution is to clear the RAM, and thereby increase your RAM.

The RPC server is unavailable

RPC server: what should you do if the RPC server is unavailable?

If the RPC server is unavailable, Windows will display the error code 0x800706BA. This means the network communication between the client and the server has been interrupted. The problem occurs fairly regularly in Windows 10. In this guide, we explain what the RPC server error message means and how you can fix it yourself without any expert network knowledge.

Apache Kafka tutorial

Kafka tutorial: getting started with Apache Kafka

The Scala-based streaming and messaging software Apache Kafka is one of the most popular solutions for efficiently storing and processing large data streams. In this Kafka tutorial, you will learn the requirements for using this open source software and how best to install and set up Apache Kafka.

Windows 7 Startup programs

How to customise the Windows 7 Startup folder simply and quickly

Access all of your most important programs right after Windows 7 starts: The Startup folder loads selected software immediately after the operating system starts. However, you might not be happy with the programs that are in the folder by default. That is why it makes sense to change your Startup programs in Windows 7. How do you do that?

Create your own app: Android app publication

Create your own app – Part 5.1: Upload an android app to Google Play

If you want to upload an app to the Google Play Store and are close to achieving that goal – your Android application is ready in the release version, and now set to find its way onto as many mobile devices as possible – there are still a few small steps left. Submitting an app to Google’s official app store may take some time. Among other things, you will also need to create accounts with various...


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