next if ...
Whenever your match is true, next jumps all the rest of your statements and returns to the next iteration of the loop.
Think about whether you need the next statement at all. If you do, you'd probably go well with:
if ( $string =~ /(<b>\w|\.+\.zip<\/b>)/ )
{
&do_something_with($1); # first
next; # next
}
Concerning what to match, best you tell us in English what exactly you do mean to match?
Is the pipe character an alternation? Or a literal pipe character? (write "\|" then, see perlre)
Cheers, Sören
Update: corrected the typo
ikegami pointed out.
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