gruber

问题 how do I get the regex mentioned in this article working with preg_match in php? <?php preg_match("\b(([\w-]+://?|www[.])[^\s()<>]+(?:\([\w\d]+\)|([^[:punct:]\s]|/)))/i", $text, $matches); print_r($matches); ?> Using the code above I get the following error: Warning: preg_match() [function.preg-match]: Delimiter must not be alphanumeric or backslash... 回答1: Try this: preg_match("#\b(([\w-]+://?|www[.])[^\s()<>]+(?:\([\w\d]+\)|([^[:punct:]\s]|/)))#i", $text, $matches); You were missing the

问题 I'm attempting to integrate John Gruber's An Improved Liberal, Accurate Regex Pattern for Matching URLs into one of my Javascripts, but WebKit's inspector (in Google Chrome 5.0.375.125 for Mac) gives an "Invalid group" regular expression syntax error. Gruber's original regexp is as follows: (?i)\b((?:[a-z][\w-]+:(?:/{1,3}|[a-z0-9%])|www\d{0,3}[.]|[a-z0-9.\-]+[.][a-z]{2,4}/)(?:[^\s()<>]+|\(([^\s()<>]+|(\([^\s()<>]+\)))*\))+(?:\(([^\s()<>]+|(\([^\s()<>]+\)))*\)|[^\s`!()\[\]{};:'".,<>?«»“”‘’]))

问题 How do I rewrite this new way to recognise addresses to work in Python? \b(([\w-]+://?|www[.])[^\s()<>]+(?:\([\w\d]+\)|([^[:punct:]\s]|/))) 回答1: The original source for that states "This pattern should work in most modern regex implementations" and specifically Perl. Python's regex implementation is modern and similar to Perl's but is missing the [:punct:] character class. You can easily build that using this: >>> import string, re >>> pat = r'\b(([\w-]+://?|www[.])[^\s()<>]+(?:\([\w\d]+\)|([