If I read the requirement of AM correct, he wants to check for the presence of a $symbol in a $sentence, where the beginning and end of $symbol should also be treated as word boundaries, provided they are word characters.

For this I would propose the following regex (using conditional pattern as suggested by japhy above):

if ($sentence =~ /(?(?=\w)(?:\b))$symbol(?(?<=\w)(?:\b))/) {
  # do something
}

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In reply to Re: Regex help by pKai
in thread Regex help by Anonymous Monk

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