Regex - Problem

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  • aeuglein
    #1

    Regex - Problem

    Hello!

    I have this RegEx:
    /([\w]+:\/\/[\w-?&;#~=\.\/\@]+[\w\/])/i

    Now, I want to exlude on the end of a String the formats .gif / .jpg /
    ..png / .exe / .zip / .rar

    How I can this add to my regex ?

    Thanks for help!

    Sincerly!
    Tags: None
    • Justin Koivisto
      #2
      Re: Regex - Problem

      aeuglein wrote:
      [color=blue]
      > I have this RegEx:
      > /([\w]+:\/\/[\w-?&;#~=\.\/\@]+[\w\/])/i
      >
      > Now, I want to exlude on the end of a String the formats .gif / .jpg /
      > .png / .exe / .zip / .rar
      >
      > How I can this add to my regex ?[/color]

      Not being all that great with regex myself, I think this may do the
      trick (or at least give you some ideas):

      /([\w]+:\/\/[\w-?&;#~=\.\/\@]+[\w\/](\.(jpg|gif|png |exe|zip|rar)){ 0})/i

      --
      Justin Koivisto - spam@koivi.com
      PHP POSTERS: Please use comp.lang.php for PHP related questions,
      alt.php* groups are not recommended.

        Comment

        • Andy Hassall
          #3
          Re: Regex - Problem

          On 9 Oct 2003 05:35:23 -0700, sdz@gmx.de (aeuglein) wrote:
          [color=blue]
          >I have this RegEx:
          >/([\w]+:\/\/[\w-?&;#~=\.\/\@]+[\w\/])/i
          >
          >Now, I want to exlude on the end of a String the formats .gif / .jpg /
          >.png / .exe / .zip / .rar
          >
          >How I can this add to my regex ?[/color]

          Assuming Perl-compatible regexes due to the use of \w.

          If you want it in one regex, add a zero-width negative look-ahead assertion to
          the end.

          (Completely untested:)

          /([\w]+:\/\/[\w-?&;#~=\.\/\@]+[\w\/]).*(?!\.(?:gif| jpg|png|exe|zip |rar))$/i

          The useful Perl module YAPE::Regex::Ex plain comes out with this explanation:

          The regular expression:

          (?-imsx:/([\w]+:\/\/[\w-?&;#~=\.\/\@]+[\w\/]).*(?!\.(?:gif| jpg|png|exe|zip |rar))$/i)

          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:
          ----------------------------------------------------------------------
          [\w]+ any character of: word characters (a-z,
          A-Z, 0-9, _) (1 or more times (matching
          the most amount possible))
          ----------------------------------------------------------------------
          : ':'
          ----------------------------------------------------------------------
          \/ '/'
          ----------------------------------------------------------------------
          \/ '/'
          ----------------------------------------------------------------------
          [\w-?&;#~=\.\/\@]+ any character of: word characters (a-z,
          A-Z, 0-9, _), '-', '?', '&', ';', '#',
          '~', '=', '\.', '\/', '\@' (1 or more
          times (matching the most amount
          possible))
          ----------------------------------------------------------------------
          [\w\/] any character of: word characters (a-z,
          A-Z, 0-9, _), '\/'
          ----------------------------------------------------------------------
          ) end of \1
          ----------------------------------------------------------------------
          .* any character except \n (0 or more times
          (matching the most amount possible))
          ----------------------------------------------------------------------
          (?! look ahead to see if there is not:
          ----------------------------------------------------------------------
          \. '.'
          ----------------------------------------------------------------------
          (?: group, but do not capture:
          ----------------------------------------------------------------------
          gif 'gif'
          ----------------------------------------------------------------------
          | OR
          ----------------------------------------------------------------------
          jpg 'jpg'
          ----------------------------------------------------------------------
          | OR
          ----------------------------------------------------------------------
          png 'png'
          ----------------------------------------------------------------------
          | OR
          ----------------------------------------------------------------------
          exe 'exe'
          ----------------------------------------------------------------------
          | OR
          ----------------------------------------------------------------------
          zip 'zip'
          ----------------------------------------------------------------------
          | OR
          ----------------------------------------------------------------------
          rar 'rar'
          ----------------------------------------------------------------------
          ) end of grouping
          ----------------------------------------------------------------------
          ) end of look-ahead
          ----------------------------------------------------------------------
          $ before an optional \n, and the end of the
          string
          ----------------------------------------------------------------------
          /i '/i'
          ----------------------------------------------------------------------
          ) end of grouping
          ----------------------------------------------------------------------

          --
          Andy Hassall (andy@andyh.co. uk) icq(5747695) (http://www.andyh.co.uk)
          Space: disk usage analysis tool (http://www.andyhsoftware.co.uk/space)

            Comment

            • Andy Hassall
              #4
              Re: Regex - Problem

              On Thu, 09 Oct 2003 15:50:50 GMT, Justin Koivisto <spam@koivi.com > wrote:
              [color=blue]
              >aeuglein wrote:
              >[color=green]
              >> I have this RegEx:
              >> /([\w]+:\/\/[\w-?&;#~=\.\/\@]+[\w\/])/i
              >>
              >> Now, I want to exlude on the end of a String the formats .gif / .jpg /
              >> .png / .exe / .zip / .rar
              >>
              >> How I can this add to my regex ?[/color]
              >
              >Not being all that great with regex myself, I think this may do the
              >trick (or at least give you some ideas):
              >
              >/([\w]+:\/\/[\w-?&;#~=\.\/\@]+[\w\/](\.(jpg|gif|png |exe|zip|rar)){ 0})/i[/color]

              (\.(jpg|gif|png |exe|zip|rar)){ 0})

              There's always a zero length match for this; zero occurrences of a pattern is
              a zero length string, and there's plenty of those in between characters :-)

              --
              Andy Hassall (andy@andyh.co. uk) icq(5747695) (http://www.andyh.co.uk)
              Space: disk usage analysis tool (http://www.andyhsoftware.co.uk/space)

                Comment

                • Justin Koivisto
                  #5
                  Re: Regex - Problem

                  Andy Hassall wrote:
                  [color=blue]
                  > On Thu, 09 Oct 2003 15:50:50 GMT, Justin Koivisto <spam@koivi.com > wrote:
                  >
                  >[color=green]
                  >>aeuglein wrote:
                  >>
                  >>[color=darkred]
                  >>>I have this RegEx:
                  >>>/([\w]+:\/\/[\w-?&;#~=\.\/\@]+[\w\/])/i
                  >>>
                  >>>Now, I want to exlude on the end of a String the formats .gif / .jpg /
                  >>>.png / .exe / .zip / .rar
                  >>>
                  >>>How I can this add to my regex ?[/color]
                  >>
                  >>Not being all that great with regex myself, I think this may do the
                  >>trick (or at least give you some ideas):
                  >>
                  >>/([\w]+:\/\/[\w-?&;#~=\.\/\@]+[\w\/](\.(jpg|gif|png |exe|zip|rar)){ 0})/i[/color]
                  >
                  >
                  > (\.(jpg|gif|png |exe|zip|rar)){ 0})
                  >
                  > There's always a zero length match for this; zero occurrences of a pattern is
                  > a zero length string, and there's plenty of those in between characters :-)[/color]

                  heh, I copied out of the wrong file... I wanted to make it into a
                  look-ahead (modified from something else I use)... oops

                  --
                  Justin Koivisto - spam@koivi.com
                  PHP POSTERS: Please use comp.lang.php for PHP related questions,
                  alt.php* groups are not recommended.

                    Comment

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