A painless guide to Apache CouchDB for a PHP developer

World of technology loves buzzwords. There is always something new which allegedly is the game changer, and we all should upgrade in the matter of urgency. On the other hand, absorbing new knowledge costs time and effort. It’s difficult to decide which technology is worth sacrificing brain glucose levels.
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How to improve PHP programming skills

“How do I improve my PHP skills?” is a recurring question on various boards and chats. It’s often asked by newbies but even experienced developers ask themselves the same thing. After all trying to be better is in the human nature. This is a deep question and when you think about it there isn’t a straight forward reply. Nevertheless I will try to give a comprehensive answer which hopefully is going to be useful not only to the beginners but also to the people with some commercial experience.
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Reading PHP session from Varnish Cache

In my previous post I showed how to integrate Varnish Cache with a PHP application. The example can solve various simple problems but it might not be enough for a complex software. A good example is a multilingual application. One URL can have multiple caches. You might also need to know more about a user (is he logged in? has he received a notification? etc) to make some additional caching decisions.
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Performance benchmark of popular PHP frameworks

There are many assumptions around performance of different PHP frameworks. I frequently hear strong opinions about superiority X over Y in this context. There are companies writing new PHP frameworks from scratch because available solutions are too slow for them. What does it really mean? Does the framework performance matters? Before answering this questions lets check how slow is your framework!
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Serial communication between Arduino and PHP with a protocol

In my previous post I discussed basics of serial communication between Arduino and PHP. Theory behind it is very simple. It all comes down to writing to a file. Simplicity of the serial communication paradoxically might contribute to confusion and surprising results. Serial device is like a black hole when you think about it. You send data inside but there is no feedback. You don’t know has your message arrived or not. You don’t know is your transmission going to be divided into multiple chunks or will arrive at one peace. There is no guarantee no feedback. On top of that there are some differences between operating systems and Arduino peculiarities. All of that combined together can confuse for a few hours or even discourage from the project.
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