I've never regretted the time I took to learn PHP. No matter how bad the language may seem, it paid my bills for a long while. It's one those tools that to keep in your back pocket until you need. Keep in mind what it's good for and what it doesn't do so well.
That said, php's online documentation is one of my "gold standards" for what good language documentation should provide. (At least it was the last time I had to reference it.)
I really like how the documentation also includes a huge amount of user contributed notes that demonstrate various alternate examples as pointing out certain caveats/nuances.
That said, php's online documentation is one of my "gold standards" for what good language documentation should provide. (At least it was the last time I had to reference it.)