My comment on one of the files of SuiteCRM …

Even though memory is getting cheaper, our applications are becoming more complicated and we need to write our code more carefully.

The aim is to write code efficiently, but without compromising easy debugging, maintenance, and especially adaptability …

I always loved the ease of use of arrays in PHP. Simple, dynamic arrays; arrays with integer indexes or string keys; hash tables, maps, collections, resizable variant arrays; you name it.

Regarding __toString

__autoload() function can be very useful to optimize your code esp. when you have so many classes.