PHP In Action writes on the use of comments in code, specifically citing Eli White’s Commenting on Commenting over at PHP Advent. They are critical of Eli’s advice, saying that comments should be unnecessary, and that code should be clean enough to easily understand it.

Sometimes I have to check an array for the existence of a value; for example, I may want to parse an array for a value and then include (or exclude) that value fro an SQL query. I quickly found out that using in_array() is slower than using isset(). For example:

I recently worked on an application I built some time ago. It was built before I had regard for performance or cared about how a MySQL database should be built. As such, it had no indexes.

Have you ever written code like this?

How many times have we heard it? Our bosses, colleagues, everyone, it seems, reminds us time and time again that we’re actually customer service professionals, as well as developers. Seems we’d get it, right?