Are you confused by the title? I was when I first got the idea to even write this blog as well. I was recently perusing the CakePHP change logs and came across an interesting commit – Optimization for Hash Method.
The optimization is quite simple, this code:
while (($key = array_shift($parts)) !== null)
Is replaced with the following code:
foreach ($parts as $key)
This is actually done several times in the commit. It seems that the original developer is really keen on using the array_shift function. Just in seeing this code, I thought the original code was odd to utilize that function so I immediately had to do a comparison and validate the optimization!