Every time someone asks me to setup some sort of 404 logging system in WordPress, I go on the hunt for a simple plugin which just does logging of the 404 errors and nothing else, and which doesn’t explode the database, overload the system or generally just do stupid stuff.

Today I gave up and made a stupid simple 404 logger. It doesn’t actually do a lot, well aside from logging 404 errors. It doesn’t store historical data, so it shouldn’t explode the database, and it doesn’t do complicated queries so should be reasonably performant (techy explanation: it just dumps them all in a non-autoloaded option).

The end result is the Simple 404 Logger plugin for WordPress. Hopefully it will be useful to some of you.