Mark
Well, this makes senses to me although I really have no idea why this substitution is necessary. It is part of the process of a digital sign. The variable $req is formatted, the way you told me, and then recorded into a txt file. $req keeps the public key of the user. The txt file, containing $req(public key), is read later by a software that sign digitally the certificate request by the user. Your explanation was very useful. Thank you so much. -----Mensagem original----- De: Mark Anderson [mailto:[EMAIL PROTECTED]] Enviada em: quinta-feira, 21 de fevereiro de 2002 14:46 Para: John Edwards; 'Lilian Alvarenga Caravela Godoy'; [EMAIL PROTECTED] Assunto: RE: Regular Expression $req =~ s/([^\n]{72,72})\n([^\n]{1,71})\n([^\n]{1,71})$/$1\n$2$3/ > # This regex appears to do nothing. It's looking for three matches, then > replacing them with the matches found. It's like saying look for all > instances of "one two three" in the string and replace them with "one two > three". Although I could be wildly wrong on that. ;) $req =~ s/([^\n]{72,72})\n([^\n]{1,71})\n([^\n]{1,71})$/$1\n$2$3/ | | | | | |\ +----$1------+ +---$2------+ +----$3-----+ $ It is doing something. It's looking at the end of $req (the $ that I marked $ looks for end of the string). If there are 72 characters that are not '\n', followed by a \n, followed by 1-71 non-'\n' characters, followed by a \n, followed by another 1-71 non-'\n' characters, followed by the end of the string, then it takes out the second \n character. Having not seen the rest of the code, I'd guess that they are somehow trying to format line lengths. I hope this helps. /\/\ark
