About Jeroen van Dijk
Jeroen van Dijk is CTO van Enrise. Daarvoor was hij mede-oprichter van 4worx, de voorloper van Enrise. Voor complexe vraagstukken bedenkt hij technisch-creatieve oplossingen die uitblinken in schoonheid en eenvoud.

Haven’t you bought your tickets to PHPBenelux 2012 yet?! Maybe it’s time to reconsider why you are not going!
Enrise is sponsoring the event in cooporation with Zend – The PHP Company and Enrise will be giving away a MacBook Air! read more…
A lot is going on at the moment at Enrise! We are extending our team on every front. Sales, project management and developers!
You’d expect that they are very busy for Enrise, but still you can read about, see and meet these Enrisers also!
read more…
Zend Server has out-of-the-box support for connectivity to Oracle databases, minimizing the time required for setting up a PHP stack. The built-in support has been limited though. From our point of view it’s just the a size issue. The complete … Continue reading →
June 3rd 2011 the official release of Solr 3.2 was pushed and marked stable. This release marks a new milestone in this great search engine. Since the release of the 3.x series the underlying Lucene engine is used as the … Continue reading →
Every web development company with a few years of portfolio must have the problem we were facing: Maintaining access to a lot of servers! Loadbalancers, webservers, file servers, database servers etc… Once in a while a new user needs access … Continue reading →
If you have seen my presentation about Varnish on the PHPBenelux Conference 2011, you know already that Varnish is a really great reverse proxy caching system that can boost your website performance massively. A somewhat lesser-known feature of Varnish is that its VCL-configuration is very powerful. So powerful in fact, that we could easily add, replace or modify headers to and from Varnish. I have shown for instance in my presentation that you can send a X-Cache-Hit or X-Cache-Miss header to display if a request has been fetched from the either the Varnish cache or has been retrieved from the back-end.
After my presentation, Andreas Creten approached me, asking about mobile device detection in Varnish. He had problems on a website keeping up with all types of mobile devices to detect in the correct way. That question didn’t result in a direct answer, but did trigger something…
What if Varnish could figure out if the visitor was working on a mobile browser, and if so, set a flag to the back-end servers so it could display a mobile site? Impossible? No. Actually, it’s quite easy… read more…
Development on websites when the product will run on a Varnish’ed’ production environment can be a pain in the ass. The xml tag that can be used to define Edge Side Includes can’t be parsed by a standard browser. While … Continue reading →