The Travelling Elephpant challenge, my two solutions

Ibuildings, a PHP development company with offices in the Netherlands, UK and Italy, have been running a series of challenges, with prizes such as iPads and tickets to the Dutch PHP Conference (DPC, of which they host). The latest completed challenge, the Elephpant challenge, was in the form of a code contest to write the fastest, shortest and least complex algorithm in PHP to solve a Travelling Salesman problem.

I’m happy to say that I was one of the winners for this task, getting 30 points (10 in each scoring method), which was the maximum points possible, for the medium category (people with 2 to 4 years experience), and winning a ticket to the DPC.

Here I will describe the two solutions I researched and completed. I only submitted the one which I thought would give me the biggest chance of winning, but each had their own specialities.

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