PHP

I am all for testing. Whether you always write unit tests in advance as Test Driven Development (TDD) advocates call for, write them after, write them alongside, a little of each, I don't care. Tests are your friend. You want tests, and specifically you want good tests.

There's a lot of opinions on what constitutes a "good" test, of course, and much is subjective to the type of code you're working on. However, since the release of PHP 7 I've found that while writing tests... I am never using a mocking library. In fact, I'm going to go as far and say that

You should never use a mocking library in PHP 7.

Before all of you gasp, clutch your pearls, and send ninja hit squads after me, let me justify that position.

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Let's be controversial: In modern PHP, you should never type-hint an array.

Before you start throwing tomatoes, hear me out.

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The other day I was working on some sample code to test out an idea that involved an object with an internal nested array. This is a pretty common pattern in PHP: You have some simple one-off internal data structure so you make an informal struct using PHP associative arrays. Maybe you document it in a docblock, or maybe you're a lazy jerk and you don't. (Fight me!) But really, who bothers with defining a class for something that simple?

But that got me wondering, is that common pattern really, you know, good? Are objects actually more expensive or harder to work with than arrays? Or, more to the point, is that true today on PHP 7 given all the optimizations that have happened over the years compared with the bad old days of PHP 4?

So like any good scientist I decided to test it: What I found will shock you!

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Articles, blog posts, and Twitter debates around "best practices" abound. You can't swing a dead cat without bumping into some article espousing the benefits of designing and building software a certain way. (Side note: What kind of sick person are you that you're swinging a dead cat around? Stop that! You're desecrating the dead!)

What nearly all of these articles fail to convey is that "best practices" are contextually-dependent. Always. For one, they evolve over time; really, there is no such thing as a "best practice"; There are "leading practices", which is an inherently changing and growing definition as the technology and market changes and as we as an industry learn more and discover new and exciting ways to royally screw up.

The team over at thePHP.cc recently published an ebook entitled PHP 7 Explained, "Everything you need to know about the next generation."

A few weeks back, I received an email from them stating "As a token of our appreciation for your involvement in the PHP community we would like to gift you a copy of our eBook." Yay, free stuff! Since I'd gotten it free, and it's of timely use to the PHP world, I decided to publish a formal review.

Disclaimer: I was not asked to write a review, although the authors did ask for feedback. The only compensation I receive for this review is the book itself, which was sent without the expectation of a review. Also to the authors, yes feel free to quote portions of this review on the books site as long as it's credited.