Code example of the fleury or hierholzer algorithm?

I'm looking for an code example of the Fleury or Hierholzer 开发者_运维知识库algorithm. I couldn't find any in my language?

Here is a decent code in pascal http://linhtruong.com/Blog/index.php?page=fleury-algorithm---find-euler-circuit but I wonder how it works? My php code is something else.