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php regular expression to match domain name in URL

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Release： 2016-07-25 09:07:27

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$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));
/*
Each group is as follows
$1 = http:
$2 = http
$3 = //www. php.net
$4 = www.php.net
$5 = /pub/ietf/uri/
$6 =
$7 =
$8 = #Related
$9 = Related
*/
?> ;

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Another concise code is provided here:

// Get the hostname from the URL
preg_match("/^(http ://)?([^/]+)/i", "http://www.php.net/index.html", $matches);
$host = $matches[2];
// from Get the last two segments from the host name
preg_match("/[^./]+.[^./]+$/", $host, $matches);
echo "domain name is: {$matches[0]} n";
?>

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Output after execution: domain name is: php.net

Related labels：

php正则表达式匹配URL中的域名

source：php.cn

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