PHP Regular expression matches the domain name in the URL

$search = ' ~^ (([^:/?#]+):)? ( //([^/?#]*))? ([^?#]*) (\? ([^#]*))? (# (. *))? ~i '; $url = ' http://www.php.net/pub/ietf/uri/#Related '; $url = Trim ($url); Preg_match_all ($search, $url, $RR); printf (" The output URL data is: %s \ n ", Var_export ($RR, TRUE)); /* The groupings are as follows $ = http: $ = http $ $ =//www.php.net $4 = Www.php.net $ $ =/pub/ietf/uri/ $6 = $7 = $8 = #Related $9 = Related */ ?> Copy Code Here's another neat code: Get host name from URL Preg_match ("/^ (http:\/\/)?" ( [^\/]+)/I "," http://www.php.net/index.html ", $matches); $host = $matches [2]; Get the next two paragraphs from the hostname Preg_match ("/[^\.\/]+\.[ ^\.\/]+$/", $host, $matches); echo "Domain name is: {$matches [0]}\n"; ?> Copy Code Post-execution output: domain name is:php.net

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