PHP gets the top-level domain name function code of the URL_PHP tutorial

PHP's top-level domain name function for obtaining URLs

The current international top-level domain names are: com|edu|gov|int|mil|net|org|biz|info|pro|name|museum|coop|aero|xxx|idv |mobi|cc|me
There are many regional domain names. They should be found in every country and region. You can collect them if you are interested. However, as far as I know, these domain names are composed of 2 letters. They can be used alone or alone. Use regional domain names in combination with international top-level domain names, such as:
cn China
tw Taiwan
hk Hong Kong

Domain name examples:
jb51.cn
baidu.com
jb51.com.cn

Take jb51.dom.cn as an example: phpwind (custom part).com (international domain name part).cn (regional domain name part)

Get the top-level domain name PHP function

Copy code The code is as follows:

function getdomain($url) {
$host = strtolower ( $url );
if (strpos ( $host, '/' ) !== false) {
$parse = @parse_url ( $host );
$host = $parse ['host'] ;
}
$topleveldomaindb = array ('com', 'edu', 'gov', 'int', 'mil', 'net', 'org', 'biz', 'info', ' pro', 'name', 'museum', 'coop', 'aero', 'xxx', 'idv', 'mobi', 'cc', 'me' );
$str = '';
foreach ( $topleveldomaindb as $v ) {
$str .= ($str ? '|' : '') . $v;
}

$matchstr = "[^. ]+.(?:(" . $str . ")|w{2}|((" . $str . ").w{2}))$";
if (preg_match ( "/" . $matchstr . "/ies", $host, $matchs )) {
$domain = $matchs ['0'];
} else {
$domain = $host;
}
return $domain;
}

Usage example:

Copy code The code is as follows :

$str = "http://www.jb51.net/tools/zhengze.html";
echo getdomain ( $str );

Output: jb51.net

http://www.bkjia.com/PHPjc/325934.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/325934.htmlTechArticlePHP’s top-level domain name function to obtain the URL. The current international top-level domain names are: com|edu|gov|int|mil|net |org|biz|info|pro|name|museum|coop|aero|xxx|idv|mobi|cc|me There are many regional domain names, it should be...