Authentication is required for virtually any type of web application. In this tutorial, I’d like to show you how you can go about creating a small authentication application using Laravel 4. We’ll start from the very beginning by creating our Laravel app using composer, creating the database, loading in the Twitter Bootstrap, creating a main layout, registering users, logging in and out, and protecting routes using filters. We’ve got a lot of code to cover, so let’s get started!

Laravel 4 is a huge step forward for the PHP community. It’s beautifully written, full of features and the community is presently exploding. Today we’re going to explore how to build multisite applications with it.

Linux Apache MySQL PHP + Bitcoin tutorial.
For this introduction we assume that you have GNU/Linux server with Apache and PHP and that you wish to interact with the Bitcoin network from a web application. We assume some knowledge of Bitcoin and experience in PHP.
While this is written for PHP, the same principles apply for other languages. See the associated API reference pages for info on other languages.
The easiest way to get started is to run Bitcoin in daemon mode with which PHP communicates via local HTTP requests. A library called JSON-RPC is used to call the various functions of bitcoind, which will respond back with a JSON object.

You may have spotted the lightbulb, cloud, electricity and woodshed symbols on your camera’s screen or menus. You may have also ignored them as being yet another degree of complexity that you don’t need to know about.

Alternatively, you may have seen people on the Internet earnestly discussing colour temperature and swearing by all sorts of essential products that will guarantee perfect results, if you re-mortgage your house this one last time. And ignored it as another expense that you can probably do without.

Well that thing you’re ignoring is one of the most powerful ways of making your photos convey the scene you wanted to capture: white balance.

Unless you’re from France, you may not yet have heard about Thelia, an e-commerce system that is getting some international attention, due in no small part to the buzzwords thrown around in the media material released for the launch of the beta version of Thelia 2 in late September.

The full version won’t be launched until the end of this year, but when an e-commerce system is described in terms of open source, Symfony, HTML5, Bootstrap, Propel, PHPUnit, Travis, Smarty and semantic microdata, it warrants some attention.

One of greatest attractions of GitHub is the community and the tooling that allows this community to share code. Each contributor can clone the repository, make their changes and then send you a pull request. As the project maintainer your job is now a whole lot easier and more manageable. No more patch files to worry about.

Follow the recipe bellow to move your SVN repo to Git.
Best of all, you get to keep the entire commit history of your project.

Any system admin working in a service provider network would certainly agree that Cacti is one of the most widely used tools in network management solutions. It is open source, has built in user authentications and user permission features, shipped with frequently used graph templates like bandwidth, 95th percentile, hard disk usage, CPU usage, load average, RAM statistics and many more. Cacti also supports 3rd party templates and plugins. If those are not enough, one can write and use one’s own templates, and that is the beauty of open source software.