Cranking code to tweak and rip out some sense of the tagging system on the site is one way to find out about functions never before seen.

Put merely as a gibberish line of text, the keywords in the tags are nothing more than a mess to wade through. Working out how to put the flavour of links and sense in frequency a little on the hard side. Thankfully, there's such a thing as pre-made functions.

array_count_values()
Messy array getting things down? Run this and the nasty nasty gets itself sorted out with a tally of appearances. Great for working out how many times a word pops up in an array.

array_keys()
When the sorting is out and done, running this juice keys up a fresh order on the array, spitting out a new one for good measure. This one is right for making more sense, given that the order will find out how to step in line after each other.

Or at least, that's the thinking behind putting these two in a brand new script.