I'm sure that Luis will appreciate the humour in this.
No, it's not that the title "Five common PHP design patterns" is funny - even though programmers knows that there's no such thing as a "PHP design pattern", because design patterns aren't language specific (although, obviously, many patterns have an OO language in mind). After all, the author's audience is the PHP "programmer" (and I use the term loosely) who thinks that patterns have nothing to do with PHP.
It's more that the author's first example is the "Factory" pattern. It must be at least once a week that Luis and I share a joke about someone who is talking about this "pattern", and then wonder musingly if they are talking about the "Factory Method" or "Abstract Factory" pattern, which are, of course, two different beasts.
Sure, you can figure it out, but in that case, why bother to have standardised names for design patterns at all?