php - Regex to match domain failing on input -

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i created regex match domain name out of input:

$pattern = '/\w+\..{2,3}(?:\..{2,3})?(?:$|(?=\/))/i'; $url = 'http://wwe.com'; if (preg_match($pattern, $url, $matches) === 1) {     echo $matches[0]; }

it works fine input:

http://google.com // output:google.com

but not able achieve these inputs: (if user enters www

http://www.google.com // output:google.com http://www.www.google.com // output:google.com

what missing?

any on appreciated

what this?

<?php  $urls = [     'http://google.com',     'http://www.google.com',     'http://www.www.google.com', ];  foreach($urls $url) {     $url = parse_url($url, php_url_host);     $url = preg_replace('/^(www\.)+/', '', $url);     echo $url . "\n"; }

output:

google.com google.com www.google.com

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