Re: finding an URL in a code and creating a hypertext link with this URL

This question was asked and answered a couple days ago. I'd check the archives. ----- Original Message ----- From: "Denis Bourdon" <dbourdon@dbourdon.com> To: <php-general@lists.php.net> Sent: Thursday, August 10, 2000 9:36 AM Subject: [PHP] finding an URL in a code and creating a hypertext link with this URL > Hello! > > I have a plain text which contains URLs and I'd like to display them with a > link: > The following string: > http://www.php.net > > would be replaced with: > <a > href="http://www.php.net">http://www.php.net</a> > > It sounds simple but actually it is pretty hard in some cases. > > First problem: what are the characters that are "reserved" or > "unsafe" in an > URL? I found the following ones: > [:space:] ( ) < > # % { } [ ] | \ ^ : > > Second problem: The URL is embedded in the text; imagine the following sentence > in the text: > just look at http://www.dbourdon.com. It's worth > visiting. > > OK, apart the fact that it's really worth visiting :-> just after the URL > there > is a dot which is ponctuation and not part of the URL. > > Third problem: it is to be done with EREGI_REPLACE and regular expressions, and > most of the signs are forbidden signs in regular expressions... > > So here is whatr I find just before getting a headache: > > $text = EREGI_REPLACE("(http://[^([:space:]\(\)<>#%:\{\}\|\\\^)]+[^([:space:] > \(\)<>#%:\{\}\|\\\^\.)])","<a > href=\"\\1\">\\1</a>",$text); > > It does work but I think the regular expressions can be improved. I have tried > to read the RFCs about URL syntax but I must admit that it's impossible to > read... > > Can you help me and improve the regular expression? I think some of you has > already dealt with this and it might be useful for lots of developers. > > And sorry for my poor English... > > Den. > > -- > Denis Bourdon - dbourdon@dbourdon.com > Etudiant à Telecom Grenoble ENSIMAG/ENSERG > site personnel: www.dbourdon.com > webmaster de l'espace étudiants de Telecom Grenoble: > www-telecoms.imag.fr/etudiants > > -- > PHP General Mailing List (http://www.php.net/) > To unsubscribe, e-mail: php-general-unsubscribe@lists.php.net > For additional commands, e-mail: php-general-help@lists.php.net > To contact the list administrators, e-mail: php-list-admin@lists.php.net >