function common_replace_urls_callback($text, $callback) {
// Start off with a regex
- $regex = '#
- (?:
- (?:
- (?:https?|ftps?|mms|rtsp|gopher|news|nntp|telnet|wais|file|prospero|webcal|xmpp|irc)://
- |
- (?:mailto|aim|tel):
- )
- [^.\s]+\.[^\s]+
- |
- (?:[^.\s/:]+\.)+
- (?:museum|travel|[a-z]{2,4})
- (?:[:/][^\s]*)?
- )
- #ix';
+ $regex = '#'.
+ '(?:'.
+ '(?:'.
+ '(?:https?|ftps?|mms|rtsp|gopher|news|nntp|telnet|wais|file|prospero|webcal|xmpp|irc)://'.
+ '|'.
+ '(?:mailto|aim|tel):'.
+ ')'.
+ '[^.\s]+\.[^\s]+'.
+ '|'.
+ '(?:[^.\s/:]+\.)+'.
+ '(?:museum|travel|[a-z]{2,4})'.
+ '(?:[:/][^\s]*)?'.
+ ')'.
+ '#ix';
preg_match_all($regex, $text, $matches);
// Then clean up what the regex left behind