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When you get YAPE::Regex::Explain installed the result for your 'old' regex should be

The regular expression: (?-imsx:&[^(amp;)|(lt;)|(gt;)]) matches as follows: NODE EXPLANATION ---------------------------------------------------------------------- (?-imsx: group, but do not capture (case-sensitive) (with ^ and $ matching normally) (with . not matching \n) (matching whitespace and # normally): ---------------------------------------------------------------------- & '&' ---------------------------------------------------------------------- [^(amp;)|(lt;)|(gt;) any character except: '(', 'a', 'm', 'p', ] ';', ')', '|', '(', 'l', 't', ';', ')', '|', '(', 'g', 't', ';', ')' ---------------------------------------------------------------------- ) end of grouping ----------------------------------------------------------------------
and for mine
The regular expression: (?-imsx:(&(?!(?:amp|lt|gt);)|[><])) matches as follows: NODE EXPLANATION ---------------------------------------------------------------------- (?-imsx: group, but do not capture (case-sensitive) (with ^ and $ matching normally) (with . not matching \n) (matching whitespace and # normally): ---------------------------------------------------------------------- ( group and capture to \1: ---------------------------------------------------------------------- & '&' ---------------------------------------------------------------------- (?! look ahead to see if there is not: ---------------------------------------------------------------------- (?: group, but do not capture: ---------------------------------------------------------------------- amp 'amp' ---------------------------------------------------------------------- | OR ---------------------------------------------------------------------- lt 'lt' ---------------------------------------------------------------------- | OR ---------------------------------------------------------------------- gt 'gt' ---------------------------------------------------------------------- ) end of grouping ---------------------------------------------------------------------- ; ';' ---------------------------------------------------------------------- ) end of look-ahead ---------------------------------------------------------------------- | OR ---------------------------------------------------------------------- [><] any character of: '>', '<' ---------------------------------------------------------------------- ) end of \1 ---------------------------------------------------------------------- ) end of grouping ----------------------------------------------------------------------
and your new regex
The regular expression: (?-imsx:&(?!(amp;)|(lt;)|(gt;))) matches as follows: NODE EXPLANATION ---------------------------------------------------------------------- (?-imsx: group, but do not capture (case-sensitive) (with ^ and $ matching normally) (with . not matching \n) (matching whitespace and # normally): ---------------------------------------------------------------------- & '&' ---------------------------------------------------------------------- (?! look ahead to see if there is not: ---------------------------------------------------------------------- ( group and capture to \1: ---------------------------------------------------------------------- amp; 'amp;' ---------------------------------------------------------------------- ) end of \1 ---------------------------------------------------------------------- | OR ---------------------------------------------------------------------- ( group and capture to \2: ---------------------------------------------------------------------- lt; 'lt;' ---------------------------------------------------------------------- ) end of \2 ---------------------------------------------------------------------- | OR ---------------------------------------------------------------------- ( group and capture to \3: ---------------------------------------------------------------------- gt; 'gt;' ---------------------------------------------------------------------- ) end of \3 ---------------------------------------------------------------------- ) end of look-ahead ---------------------------------------------------------------------- ) end of grouping ----------------------------------------------------------------------
poj

In reply to Re^7: Interpolating subroutine call in SQL INSERT INTO SELECT statement by poj
in thread Interpolating subroutine call in SQL INSERT INTO SELECT statement by shadowsong

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