You can type in anything and we'll show you the data we have sounds a lot like Google search.

It doesn't detect that telivision is an incorrect spelling because there are so many authoritative examples of that spelling: http://www.wordnik.com/words/telivision [wordnik.com]

Google seems to do a good job of detecting spelling errors and automatically updating it's dictionary and of course it also shows you websites where that word is used. I don't really see what Wordnik provides.

Here's the results for 'magic' [wordnik.com].

Gee, it sure looks like they're returning random search engine results next to—oh look, a list of opinions as proferred by so-called "linguistic middlemen."

I like how the top example for how 'magic' is used in English isn't even purely English, but a bullet point about features in the Zend framework. I'll make a habit of saying "__magic()" in everyday speech more often!

I think the worst outcome of this is that PHP now somehow has influence on the evolution of a natural language. I do not believe I am alone in feeling terrified by this prospect.

Oh, that's purely typographical. When moving blocks of metal type around, a full-stop/period or comma is more delicate than a quotation mark, since it's only x-height and not capital letter height. Typographers got in the habit of putting them on the inside to keep them safe. That's also why certain ligatures of f and the long s were preserved from scribal writing: those letters were designed to hook over others, and if the next letter was tall then it would create a structural instability (an x-height hole.) If modern punctuation had evolved before the invention of moveable type, we would probably put the quotation mark directly above the other punctuation mark, and use logical punctuation for ? and !. However, it didn't, so it was all put inside to stay consistent.

To be honest, I find it visually more pleasant. After looking at code that passes strings around as arguments in C-style imperative languages all day, it's nice to see something without a big gap on the baseline (this "is," an "example", for you.) Since the quotation mark is already floating up and away from the letters, it's less jarring to see it separated from the word than a comma or period. (This is more or less the modern aesthetic justification for keeping it the traditional way. However, modern typographers don't always agree with traditionalists: watch what happens when you point out that the "single" space used to separate sentences prior to the invention of the typewriter was actually larger than a standard double space.)