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My guide to commenting on joind.in

Date: 17 Dec 2015
Tags: [ joindin

If you are visiting pretty much any (random) PHP conference these days, you will hear a lot of talk about “rating talks on joind.in”. For those not familiar with this site: it’s a site where you can find additional information about the talk (like slides), and where you can leave a rating and/or comment about the talks and conferences that you have attended.

It’s a great way to prepare for an upcoming conference: check out the talks you want to see, and see if the presenter has already given the presentation at another conference and view the rating / comments. This way, you have a good picture (although never the complete picture), of the presentation you are about to see. Also, often presenters will add their slidedeck to talks, so you can actually see what the presentation will look like.

Moving to Jekyll

Date: 11 Dec 2015
Tags: [ Wordpress ]  [ Jekyll

As you might notice, i’ve switched my blogging engine from Wordpress to Jekyll. There are actually a few reasons for this:

Benford's law in frameworks

Date: 09 Dec 2015
Tags: [ Benford ]  [ PHP ]  [ Statistics

In a new talk I’m currently presenting at conferences and meetups, I talk - amongst other things - about Benford’s law. This law states that in natural occurring numbers, the first digit of those numbers will most often start with a 1 (around 30% of the time), and logarithmically drops down to the number 9, which occurs only 5% of the time. This might sound strange: why would a number that starts with 1, (like 1, 16, 152 or even 152533), be more common than 2,25, 266, or even the lesser common 6, 63, 6474 etc? And although there are some explanations, a definitive one still isn’t there.

Symfony, XDebug and the maximum nesting level

Date: 15 Nov 2015
Tags: [ Forms ]  [ XDebug ]  [ PHP ]  [ Twig ]  [ Symfony2

Here you are, developing your code based on the Symfony2 framework. Creating a form here, add a Twig template there, until suddenly, boom! Your site doesn’t work anymore, and all the info you can find in your PHP logs is:

PHP Fatal error:  Maximum function nesting level of '100' reached, aborting! in Unknown on line 0

What just happened? Did I create some kind of recursive function I wasn’t aware of, did somebody commit code that I accidentally pulled? Did Jupiter align with Mars and somehow this is causing issues in my code. Who knows? Fortunately for us developers, there is a quick way to deal with this: google it..

Incrementing values in PHP

Date: 13 Oct 2015
Tags: [ Bytecode ]  [ Internals ]  [ PHP

Take a variable, increment it with 1. That sounds like a simple enough job right? Well.. from a PHP developer point of view that might seem the case, but is it really? There are bound to be some catches to it (otherwise we wouldn’t write a blogpost about it). So, there are a few different ways to increment a value, and they MIGHT seem similar, they work and behave differently under the hood of PHP, which can lead to - let’s say - interesting results.

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