Ok, this caused a fair amount of hair pulling at my end, and I couldn’t find anyone else who had blogged about it… so..

I recently rolled Known’s Symfony components up from using the 2.x version of PDOSessionHandler to 4.x. I had tried this before, but I thought I’d have a fresh attempt at it, but ran into the same weird problems.

Sometimes things would work, but other times it wouldn’t, and the CI tests would consistently fail with a PDOException "There is no active transaction"

Symfony docs, and no amount of googling, got me nowhere. Eventually, reading through the code comments, I hit on the answer. So, I’m writing it here to make things clearer, and with hopes that someone else in a similar position doesn’t have such a frustrating time of it.

Turns out that PDOSessionHandler has switched to using transactions by default. Fine, but it turns out that this can cause some interesting interactions if you share the same database connection as used by the application (which was what we were previously doing, and was the standard way of doing things circa 2.x).

Your options then are either to create a second connection to the database, just for the session (which is not great for our purposes, as it would require two database connections per page load), or turn off transactions.

To do this, pass as an option:

Hope you find this helpful!

Symfony Twig is a PHP templating engine, which has pretty much become the standard way that PHP applications do templating. I’ve used it in other projects, and find it pretty cool.

Known uses its own PHP templating language… or rather, it uses PHP. But, I thought it would be useful if Known could support both.

So, in the latest build, as well as .tpl.php Bonita template files, you can also create .html.twig files. These work in pretty much the same way, with the same hierarchy, but provide a more “standard” way of doing things.

I don’t imagine Bonita going anywhere any time soon, but I will probably be moving more and more stuff to twig going forward.

I use the Crayon syntax highlighting plugin in order to display code on this blog. Recently I upgrade my server to PHP 7.3, which broke a fair few things, including this plugin.

Unfortunately, it looks like this plugin is no longer being maintained – the latest stable release was three years ago, and the latest commit on their GitHub was over a year ago.

Never fear, open source is here!

If you’re using the stable version, open up crayon_langs.class.php and change crayon_langs.class.php:340 from this:

To this:

Notice the escaping before the - character.

Should work now.