Square pyramidal numbers and implementing them in PHP Imagine a couple of boxes standing on a table. In each of these boxes there is one or more balls. Boxes are sorted according to the number of balls they contain. When you look into these boxes, you notice, that in the first ...

In this article I look how to compare two arrays against one another in PHP. For the purpose, I provide a flexible PHP class, which allows for comparisons of both arrays and objects whose internal working is based on array. The class, I called it SWWWArrayCompare, carries out ...

If you have ever tried to obtain a formatted value in PHP, it is likely you did so with one of printf, sprintf of vsprintf functions. In general, these utilities accept a formatting string and one or more arguments. php.net has some good examples and descriptions on how they ...

This article provides two more examples of PHP functions which employ linear recursion. They are min() and max(). I wrote them partly for fun, but also to carry out a basic speed test on a piece of interpreted PHP code, results of which I hoped, would give me some insight into ...