Finding urls from text string via php and regex? [duplicate]

Answer 1

$pattern = '#(www\.|https?://)?[a-z0-9]+\.[a-z0-9]{2,4}\S*#i';
preg_match_all($pattern, $str, $matches, PREG_PATTERN_ORDER);

Answer 2

I'm not sure if I've understood what you need correctly, but can you use something like this:

preg_match('#^.+?://#', $url);

to find if there is a protocol specified on the string, and if not just append http://