使用正则表达式从字符串中排除特定字符

Question

I have a regex that extracts typed URL's from a string (a description text that could include typed URL's) and converts them to href's. This all works fine except for the fact that when a URL is typed and it's last character is a "," of ")" it also takes this character as part of the URL. How could I prevent this?

Example text:

Hi this is my beautiful message which contains a link (see www.website.com) and some more info.

My regex reads the URL but also takes the last character ")" when it creates the href, resulting in a bad link.

My Regex:

preg_replace("#(^|[\n ])((www|ftp)\.[^ \"\t\n\r< ]*)#", "\\1<a href=\"http://\\2\" target=\"_blank\">\\2</a>", $text);

Answer 1

Include "," and ")" in the list of URL terminating characters. Don't forget to escape ")" with a backslash. In other words, try:

preg_replace("#(^|[\\n ])((www|ftp)\\.[^ \\"\\t\\n\\r< \\),]*)#", "\\\\1<a href=\\"http://\\\\2\\" target=\\"_blank\\">\\\\2</a>", $text);

(I haven't tested this.)

Answer 2

看起来你在url.try之后匹配任何东西。

preg_replace("#(^|[\n ])((www|ftp)\.[^ \"\t\n\r< ][^\,)]*)#", "\\1<a href=\"http://\\2\" target=\"_blank\">\\2</a>", $text);