Software Engineering

One of the funny observations as a web developer: It’s amazing how many people consider caching bad by definition. If you know what you’re doing, caching is an amazingly powerful tool, which can provide cheap and efficient scaling to those who know how to use it.

Know when it’s okay to cache

If thousands of people see the same non-personal frontpage of your website - do you then do the 20+ database queries to build a fresh one for each visitor or do you just refresh a cacheable version from time to time?

Many online sites such as news-sites and other content providers often have a “tip a friend” option. With this you can mail a friend and tell them about an interesting piece of content you’ve found. The Idea seems quite simple, and everyone should have the tip-option, wright? - no, wrong. While it may offer a convenience for some, it has several backsides.

First if you - or your email provider - has implemented anti-spam techniques such as SPF-records, the “tipping mail” will not be sent through the authorized list of mail-servers and thus have a larger likelihood of being labeled as spam. Your mail be sent, but you don’t know if it will arrive in your friends mailbox.

To every modern web 2.0 site offering tagging seems to be an absolute requirement. While I may agree, that tagging in some cases may offer some improvements in content navigation over many other points, I do think it’s been too abused in way to may cases.

Tags on sites such as Flickr and Del.icio.us are absolutely fantastic. They offer some cross navigation options, which would probably be near impossible, if not for the tags. I often find my self exploring links though del.icio.us, since the content stored there generally seem to be of a muh high quality than a simple Google search on a common term.

A great strength in PHP is that it’s so accessible, that almost anyone can get access to a PHP site and often will download “applications” for their site such as discussion boards, photo galleries and others. While it may easy to download such applications, it often happens that the people trying to get things to work, doesn’t read the requirements section of the install.txt or readme.txt file, and thus never get the application running and doesn’t understand what the problem was and how to fix it. This is a brief guide with some tips on how to improve usability in this area.

The option to leave comments on this site has now been disabled. A new version of the website is coming and the pain comments – from time to time – causes with movable type (in terms of comment spam, server load and likewise issues) is really not worth the trouble. You will quite possible be able to leave a comment once the new version is launched, but until then sorry, no comments.