Description:
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I wanted to know what function was being called in some PHP code: "$db->multi_query($sql)"

So I punched php.net/multi_query into my web browser.

I was able to find the function on Google:

http://php.net/manual/en/mysqli.multi-query.php

But you won't find it using my first approach:

http://php.net/multi_query

Expected result:
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I expected to find mysqli::multi_query

Actual result:
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I did not find mysqli::multi_query