Need to solve error in PHP code useful for getting Google PageRank

We are working on to get Google pagerank using php code for one of our customer projects.
But, today this code didn’t work in our customer’s server even when fsockopen is enabled in their server.

During debugging I came to know that Google returns “Your client does not have permission…” error message.
I have gone thro’ many forums to know more about this issue.

But it seems there is no solid answer for this issue. Everyone is having different experience/opinion with this issue.

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