Etienne Kneuss has an update on the PHPT Generator project posted to his blog, mentioning specifically how it was used to discover documentation problems in the generated phpt files.

The main use of those phpt files was to have an easy way to check examples used in the documentation. Along with a php script analyzing the results and Hannes' great testing environment, I was able to generate a summary of the examples failing.

The results show that over 50% of the documents passed the test, with the rest split between failing because of missing extensions (9%) and because of an error in the example (41%).