casue \w in perl include @ and ! and punction sign,

This isn't true. See the following example, 

print "no match" unless 's!!!@@@___' =~ /\A[a-zA-Z][\w.-]*\z/;

[download]
which prints "no match." \w only matches letters, digits, and underscores. Maybe you could show us an example program where this is happening so we can provide some better advice.

In reply to Re: how to state this by REL by Errto
in thread how to state this by REL by whatluo

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