It does localize $_, but it also aliases it to each item. Quoth perldoc perlsyn: 

       The "foreach" modifier is an iterator: it executes the statemen
+t once
       for each item in the LIST (with $_ aliased to each item in turn
+).

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In reply to Re: Understanding typeglobs and local() by Fletch
in thread Understanding typeglobs and local() by whio

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