Regular expressions to get userid in an html file

Hi,

I would like to parse an html file containing several link with userid
in order to retrieve all userid and put them into an array.

Here is what my html looks like :

....r"><a href="userprofile.php?userid=346047" ><img s...

And want : array("346047", ...);

I am playing with RegEx without success.

Do you have an idea ?

Thanks a lot for your help.

thierry

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