From personal experience I can tell that google spiders have no problems indexing files with *.php?page=*. As example:
http://godzilla.bounceme.net/~godzil...p?page=soen357 is easily indexed. Note also that the rankings of such pages do not suffer in any fashion.
But as all previous users have mentionned, any crawler google or not may have difficulty to index long url's with "?". As an example:
http://godzilla.bounceme.net/~godzil...JtXzIwMDIuZG9j is sometimes indexed, sometimes not.
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