As said by others, I'd rename the talk to something like PHP Opcode: Under the hood. There was no real use case for realistic optimisations.
However, this concept is something every advanced php developer should know. The information was of a good level, it was well prepared and resulted in a good Q&A afterwards.
Entertaining as always. And I even managed to learn things at that hour!
Clearly I expected something else by the title of this talk. It's not per se a bad thing, but the talk consisted more of a listing of (to me) a few gimmicks in PostgreSQL which could be used to store some nonrelational data.
The content was of a good level and very complete in its presentation, but it didn't help me with the thought if postgreSQL is a good replacement for so structures we're currently storing in MongoDB.
Great switch from talk to tutorial, motivating to try it out and continue using.
Easily the best talk at phpbenelux so far. Very well presented, and interesting content. PHP is growing up..
Got some good information during the talk. The concepts were told repeatedly, which could be improved to make the talk more interesting.
Another improvement could be the practical side of being hacked. With such amount of expertise, why not demo the steps how to find the malicious files and cleanup the application/server?
Great talk. Good content presented in a nice way (and with suprising energy at 9am)
Nice basic explanation of the opcodes and other things we usually ignore. I do agree with Koen that in most cases there's no practical use (anymoresince 5.3)
Great talk, which covered details about PHP that I feel every professional PHP developer should have at least a basic understanding of. The information was presented in a clear, easy to understand way. It was clear Davey put a lot of time, thought, and effort into this presentation, and it paid off.
The only criticism I could possibly provide is maybe to adjust the talk title to avoid any misinterpretation that this talk would be providing concrete optimization ideas that could be immediately applied. The disclaimer at the beginning was helpful to set the correct expectations.
Overall, fantastic talk.
Really interesting topic and brought very clearly.
Live coding is a great idea while doing this talk and I loved the preparation of the "bad" example, however, it might have been too much. There wasn't enough time in the talk to completely refactor the example, there was also so much going on, it sometimes became difficult to follow.