Documentation

Working with Git is... complex.

While reading about Doctrine's cache mechanism (which applies to other stuff than database queries, by the way), my eye was caught by a little message at the end (last section) about cache slams. I have used cache mechanisms extensively over the last few years, but (maybe luckily) never happened to witness a "cache slam". There's a link to a blog (by an unnamed author) that explains that. To make it short, you can have race conditions in APC (and

Did you know...? As a "take away" information taken from this post https://gist.github.com/nikic/6699370 (by famous PHP core developer @nikita_ppv), it appears like the @ sign in PHP (used to "hide" errors, as the "error-suppression operator" it is) also disables the "compiled variables" optimization (OpCode caching).

Just a (great) reference: http://vimregex.com/ Read it = love it!

If you're like me and you've developed a CDN distribution for your website's content (while waiting for SPDY to be widely adopted and available in mainstream distributions), you might have noted that the Googlebot is frequently scanning your CDNs, and this might have made your website a bit overloaded. After all, the goal of the CDNs are (several but in my case only) to elegantly distribute contents across subdomains so your browser will load the page resources faster (otherwise it gets blocked by the HTTP limit or any higher limit set by your browser of simultaneous content download). Hell,

The default installation of Varnish 3 on Debian-based system (including Ubuntu) will set a default timeout for sending files to users (i.e.

One possible annoying element of Chamilo is it can only answer to one address at a time.

With the Command Line Interpreter for PHP (most of the time called php-cli or php5-cli), you can check if one single file contains syntax errors by simply calling

php5 -l file.php

The problem with that is, if you have many files to check, on the command line you might easily spend your time typing filenames.

(Read the update below before starting to copy-paste) To install Xhprof on PHP5.4 on Ubuntu (assuming you've already got PHP5.4 from Andrej or somewhere safe) in order to measure the load of Chamilo 1.10 dev (you need to have a mercurial clone, otherwise the "tests" directory will not exist), follow this procedure (all lines prefixed with # are comments):

cd /tmp
sudo apt-get install php5-dev php-pear
pecl bundle xhprof
cd xhprof

# Here you will have to apply the patch mentioned here: https://bugs.php.net/bug.php?id=61674 to your extension/xhprof.c file (otherwise it won't compile