Yann "Bug" Dubois

The PHP language can be used to remote-control an actual web-browser on a server, to allow server-side scripting of complex web interactions involving for example Javascript of Flash-enabled content. This is a very powerful context, but it is tricky to setup. In addition, a proxy such as Squid can be used to log all http interactions, and can be used as an in-depth traffic analysis or debugging tool. This environment can be used for automated web debugging, continuous integration, unit-testing based web development, non-regression testing, load tests, automated screenshots, etc. Here is a quick setup memo for a running environment under Debian Linux (headless server).

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Ever since WordPress 3.0 was released, the TwentyTen theme bundled with the distribution has included a feature do dynamically manage the content and organization of menu items from inside the WordPress administration interface. Here’s a step-by-step guide to integrate that feature to any existing WP theme.

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When file permissions are not setup the way it expects, WordPress cannot use the automatic upgrade feature and prompts you for FTP or SFTP credentials to perform any upgrade on a theme, plugin or the core WP files. This happens even when WordPress does have actual write permissions on the files that need to be upgraded.

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Here is a quick and very simple way to calculate all linear component specifications of a LM 555 type timer IC chip based astable oscillator electronic circuit. This will give you resulting frequencies and pulse width for different resistor and capacitor values arranged in the provided classic circuit diagram.

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Wear and tear have finally overcome. This Canon Powershot G10 has a stuck lens, and the warranty has long expired. I decided to take it apart to see if there is something to be done about it. I took some photographs of the tear-down process, and here is a detailed inside view of the camera.

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Here is a short memo that I use for quickly reinstalling an operational configuration under Debian / Apache2 / PHP5 / Mysql for hosting web sites on a dedicated GNU/Linux hosted server. This configuration also includes eAccelerator and basic supervision and administration tools (Munin, phpsysinfo, mtop, PhpmyAdmin, AWStats). It is directly operational and sufficiently secured for a standard install (as long as packages are regularly updated). Anyways it works for me©®™.

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Any serious hobbyist-grade two-channel digital oscilloscope is worth a few hundred bucks, with professional lab models reaching into the few thousands. One way to avoid spending too much on such a versatile equipment is to use a personal desktop or laptop computer as a digital oscilloscope. Commercially available plug-and-play probing interfaces and compatible software and drivers are still quite an expensive option. Alternatively, here is a way to turn any GNU/Linux computer with an integrated sound board into a free digital oscilloscope using free software and custom-built probes. Just follow this step-by-step visual guide.

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