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As usual seems interesting!
For a newbie just curious, can you add more infos (What it can do) in your description ?
Added description, but I wouldn't call this script interesting. It's rather simple.
And sorry, but I can't find any example where this could actually work and do something. I forgot to keep links in the commits description and can't find anything from scratch. Try to look for leech_out.php, though. That's one of the redirect pages used on such sites.