Problem in multiline regular expression

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  • rizwan6feb
    New Member
    • Jul 2007
    • 108
    #1

    Problem in multiline regular expression

    Hi everyone! I am having a problem in getting the correct regular expression. I have the following string, and i want to get everything between [htmlcode] and [/htmlcode]

    [htmlcode]
    <html>
    <head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title>Untitl ed Document</title>
    <style>
    [/htmlcode]


    using the following regular expression but this is not working, may be due to multiline issue

    $regex="/\[htmlcode\](.+)\[\/htmlcode\]/"
    Tags: None
    • Markus
      Recognized Expert Expert
      • Jun 2007
      • 6092
      #2
      Originally posted by rizwan6feb
      Hi everyone! I am having a problem in getting the correct regular expression. I have the following string, and i want to get everything between [htmlcode] and [/htmlcode]

      [htmlcode]
      <html>
      <head>
      <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
      <title>Untitl ed Document</title>
      <style>
      [/htmlcode]


      using the following regular expression but this is not working, may be due to multiline issue

      $regex="/\[htmlcode\](.+)\[\/htmlcode\]/"
      i don't know if ' .+ ' is the correct syntax; I normally use ' .* '

      Therefore:
      [php]
      $regex="/\[htmlcode\](.*)\[\/htmlcode\]/"
      [/php]

        Comment

        • Atli
          Recognized Expert Expert
          • Nov 2006
          • 5062
          #3
          Try
          Code:
          /\[htmlcode\](.|\s)*\[\/htmlcode\]/
          If memory serves, the . class does not include white-space characters, such as \n and \t, so it would stop at new-lines.

            Comment

            • rizwan6feb
              New Member
              • Jul 2007
              • 108
              #4
              Originally posted by Atli
              Try
              Code:
              /\[htmlcode\](.|\s)*\[\/htmlcode\]/
              If memory serves, the . class does not include white-space characters, such as \n and \t, so it would stop at new-lines.
              Thanks! It works but also returns the part which contains [htmlcode] i.e returns the pattern as well, the second array contains nothing. I am using preg_match (PHP function). Passing only first 2 parameters.

                Comment

                • Atli
                  Recognized Expert Expert
                  • Nov 2006
                  • 5062
                  #5
                  Ahh, the problem is probably that the * is outside the parenthesized subpattern.

                  Maybe this will work:
                  Code:
                  /\[htmlcode\]([\w\W]*)\[\/htmlcode\]/
                  It basically creates a class with all the alpha-numeric characters... and all the non-alpha-numeric characters.

                  The entire string should be int the first element of the match array, but the sub-pattern in the second (at index 1).

                    Comment

                    • rizwan6feb
                      New Member
                      • Jul 2007
                      • 108
                      #6
                      Yes the * was outside parenthesis. This time its working perfectly.
                      Thank you very much.

                        Comment

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