带链接的Preg_replace URL：MIME类型失败

Question

I use the following regexp in a php function to replace URLs with proper HTML links:

return preg_replace('@(https?://([-\w\.]+[-\w])+(:\d+)?(/([\w/_\.#-]*(\?\S+)?[^\.\s])?)?)@', '<a href="$1" target="_blank">$1</a>', $s);

But when $s has for value a string like

<li>http://www.link.com/something.pdf</li>

the function returns

<li><a href="http://www.link.com/something.pdf</li">http://www.link.com/something.pdf</li></a></li>

Does anyone know how to modify the regexp to get the intended string, i.e.

<li><a href="http://www.link.com/something.pdf">http://www.link.com/something.pdf</a></li> ?

without excluding from the replacement substrings of the URL introduced by '%', '?' or '&' ?

Answer 1

Really easy solution:

return '<li>'.preg_replace('@(https?://([-\w.]+[-\w])+(:\d+)?(/([\w-.~:/?#\[\]\@!$&\'()*+,;=%]*)?)?)@', '<a href="$1" target="_blank">$1</a>', $s).'</li>';

If you really want a regex:

return preg_replace('@(https?://([-\w.]+[-\w])+(:\d+)?(/([\w-.~:/?#\[\]\@!$&\'()*+,;=%]*)?)?)@', '<a href="$1" target="_blank">$1</a>', $s);