preg_match_all regex subdomains

Question

Hi I have this regex to match ursl, but i need to match subdomains too.

public function getUrls($url){
     preg_match_all( "#(www\.|https?:\/\/){1}[a-zA-Z0-9]{2,}\.[a-zA-Z0-9]{2,}(\S*)#i",$url, $matches );
     return $matches[0];
}

this match http://domain.com but not http://sub.domain.com

Any idea how to make it work?

Take a look to: http://stackoverflow.com/questions/288810/get-the-subdomain-from-a-url — Birei, Dec 07 '11 at 23:21

score 1 · Accepted Answer · answered Dec 07 '11 at 23:16

1

Replace [a-zA-Z0-9]{2,}\. with ([a-zA-Z0-9]{2,}\.)+. But the regex matches a lot of invalid domains, and probably won't match all valid urls either. It would be wiser to use a proper parser library for urls if the language you're using provides it.

answered Dec 07 '11 at 23:16

markijbema

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preg_match_all regex subdomains

1 Answers1