在php中获取域名(不是子域)
我有一个URL,可以是以下任意格式:在php中获取域名(不是子域),php,regex,domain-name,Php,Regex,Domain Name,我有一个URL,可以是以下任意格式: http://example.com https://example.com http://example.com/foo http://example.com/foo/bar www.example.com example.com foo.example.com www.foo.example.com foo.bar.example.com http://foo.bar.example.com/foo/bar example.net/foo/bar 本质
http://example.com
https://example.com
http://example.com/foo
http://example.com/foo/bar
www.example.com
example.com
foo.example.com
www.foo.example.com
foo.bar.example.com
http://foo.bar.example.com/foo/bar
example.net/foo/bar
本质上,我需要能够匹配任何正常的URL。如何通过单个正则表达式从所有这些文件中提取
example.com
(或.net,无论tld是什么。我需要它来处理任何tld。) 您可以使用解析url
获取主机:
$info = parse_url($url);
$host = $info['host'];
然后,您可以做一些奇特的事情,只获得TLD和主机
$host_names = explode(".", $host);
$bottom_host_name = $host_names[count($host_names)-2] . "." . $host_names[count($host_names)-1];
不是很优雅,但应该有用
如果您需要解释,请看下面的内容: 首先,我们通过使用
parse\u url
的功能来获取方案之间的所有内容(http://
,等等)。。。好。。。。解析URL:)
然后我们获取主机名,并根据句点所在的位置将其分隔成一个数组,因此test.world.hello.myname
将变成:
array("test", "world", "hello", "myname");
然后,我们取数组中的元素数(4)
然后,我们从中减去2,得到倒数第二个字符串(在您的示例中是主机名,或example
)
然后,我们从中减去1得到最后一个字符串(因为数组键从0开始),也称为TLD
然后我们将这两部分用句号组合起来,您就有了基本主机名。如果不使用TLD列表进行比较,就不可能获得域名,因为它们存在许多结构和长度完全相同的情况:
请随意使用我的功能:
function tld_list($cache_dir=null) {
// we use "/tmp" if $cache_dir is not set
$cache_dir = isset($cache_dir) ? $cache_dir : sys_get_temp_dir();
$lock_dir = $cache_dir . '/public_suffix_list_lock/';
$list_dir = $cache_dir . '/public_suffix_list/';
// refresh list all 30 days
if (file_exists($list_dir) && @filemtime($list_dir) + 2592000 > time()) {
return $list_dir;
}
// use exclusive lock to avoid race conditions
if (!file_exists($lock_dir) && @mkdir($lock_dir)) {
// read from source
$list = @fopen('https://publicsuffix.org/list/public_suffix_list.dat', 'r');
if ($list) {
// the list is older than 30 days so delete everything first
if (file_exists($list_dir)) {
foreach (glob($list_dir . '*') as $filename) {
unlink($filename);
}
rmdir($list_dir);
}
// now set list directory with new timestamp
mkdir($list_dir);
// read line-by-line to avoid high memory usage
while ($line = fgets($list)) {
// skip comments and empty lines
if ($line[0] == '/' || !$line) {
continue;
}
// remove wildcard
if ($line[0] . $line[1] == '*.') {
$line = substr($line, 2);
}
// remove exclamation mark
if ($line[0] == '!') {
$line = substr($line, 1);
}
// reverse TLD and remove linebreak
$line = implode('.', array_reverse(explode('.', (trim($line)))));
// we split the TLD list to reduce memory usage
touch($list_dir . $line);
}
fclose($list);
}
@rmdir($lock_dir);
}
// repair locks (should never happen)
if (file_exists($lock_dir) && mt_rand(0, 100) == 0 && @filemtime($lock_dir) + 86400 < time()) {
@rmdir($lock_dir);
}
return $list_dir;
}
function get_domain($url=null) {
// obtain location of public suffix list
$tld_dir = tld_list();
// no url = our own host
$url = isset($url) ? $url : $_SERVER['SERVER_NAME'];
// add missing scheme ftp:// http:// ftps:// https://
$url = !isset($url[5]) || ($url[3] != ':' && $url[4] != ':' && $url[5] != ':') ? 'http://' . $url : $url;
// remove "/path/file.html", "/:80", etc.
$url = parse_url($url, PHP_URL_HOST);
// replace absolute domain name by relative (http://www.dns-sd.org/TrailingDotsInDomainNames.html)
$url = trim($url, '.');
// check if TLD exists
$url = explode('.', $url);
$parts = array_reverse($url);
foreach ($parts as $key => $part) {
$tld = implode('.', $parts);
if (file_exists($tld_dir . $tld)) {
return !$key ? '' : implode('.', array_slice($url, $key - 1));
}
// remove last part
array_pop($parts);
}
return '';
}
最新版本及解释(德语):使用
https://subdomain.domain.com/some/path
作为示例
parse\u url($link,PHP\u url\u HOST)
返回subdomain.domain.com
分解('.',解析url($link,PHP\u url\u HOST))
然后将subdomain.domain.com
分解成一个数组:
array(3) {
[0]=>
string(5) "subdomain"
[1]=>
string(7) "domain"
[2]=>
string(3) "com"
}
array\u slice
然后对数组进行切片,使数组中仅包含最后2个值(由-2
表示):
内爆
然后将这两个数组值组合在一起,最终得到domain.com
注意:只有当您期望的终端域中只有一个
时,这才有效,例如something.domain.com
或else.something.domain.net
它不适用于something.domain.co.uk
,您希望domain.co.uk
我的解决方案
测试就在这里
它适用于任何TLD和可怕的子域模式(最多3个子域)
有一个测试包含了许多域名
由于StackOverflow中的代码有奇怪的缩进(可能有github这样的防护代码块),因此不会将函数粘贴到此处。我认为处理此问题的最佳方法是:
$second_level_domains_regex = '/\.asn\.au$|\.com\.au$|\.net\.au$|\.id\.au$|\.org\.au$|\.edu\.au$|\.gov\.au$|\.csiro\.au$|\.act\.au$|\.nsw\.au$|\.nt\.au$|\.qld\.au$|\.sa\.au$|\.tas\.au$|\.vic\.au$|\.wa\.au$|\.co\.at$|\.or\.at$|\.priv\.at$|\.ac\.at$|\.avocat\.fr$|\.aeroport\.fr$|\.veterinaire\.fr$|\.co\.hu$|\.film\.hu$|\.lakas\.hu$|\.ingatlan\.hu$|\.sport\.hu$|\.hotel\.hu$|\.ac\.nz$|\.co\.nz$|\.geek\.nz$|\.gen\.nz$|\.kiwi\.nz$|\.maori\.nz$|\.net\.nz$|\.org\.nz$|\.school\.nz$|\.cri\.nz$|\.govt\.nz$|\.health\.nz$|\.iwi\.nz$|\.mil\.nz$|\.parliament\.nz$|\.ac\.za$|\.gov\.za$|\.law\.za$|\.mil\.za$|\.nom\.za$|\.school\.za$|\.net\.za$|\.co\.uk$|\.org\.uk$|\.me\.uk$|\.ltd\.uk$|\.plc\.uk$|\.net\.uk$|\.sch\.uk$|\.ac\.uk$|\.gov\.uk$|\.mod\.uk$|\.mil\.uk$|\.nhs\.uk$|\.police\.uk$/';
$domain = $_SERVER['HTTP_HOST'];
$domain = explode('.', $domain);
$domain = array_reverse($domain);
if (preg_match($second_level_domains_regex, $_SERVER['HTTP_HOST']) {
$domain = "$domain[2].$domain[1].$domain[0]";
} else {
$domain = "$domain[1].$domain[0]";
}
这是我写的一个函数,用来抓取没有子域的域,不管域是使用ccTLD还是新样式的长TLD,等等。。。没有查找或大量已知TLD,也没有正则表达式。使用三元运算符和嵌套可以缩短很多,但为了可读性,我扩展了它
// Per Wikipedia: "All ASCII ccTLD identifiers are two letters long,
// and all two-letter top-level domains are ccTLDs."
function topDomainFromURL($url) {
$url_parts = parse_url($url);
$domain_parts = explode('.', $url_parts['host']);
if (strlen(end($domain_parts)) == 2 ) {
// ccTLD here, get last three parts
$top_domain_parts = array_slice($domain_parts, -3);
} else {
$top_domain_parts = array_slice($domain_parts, -2);
}
$top_domain = implode('.', $top_domain_parts);
return $top_domain;
}
我建议对所有具有域名的操作使用库。我对pocesar提供的解决方案有问题。 当我使用subdomain.domain.nl作为实例时,它不会返回domain.nl。相反,它将返回subdomain.domain.nl 另一个问题是domain.com.br将返回com.br 我不确定,但我用以下代码解决了这些问题(我希望它能帮助别人,如果是这样的话,我是一个快乐的人): 函数get\u domain($domain,$debug=false){ $original=$domain=strtolower($domain); if(过滤器变量($domain,过滤器验证IP)){ 返回$domain; } $debug?打印('»;解析:'.$original):false; $arr=array\u切片(array\u过滤器(分解('.',$domain,4),函数($value){ 返回$value!=“www”; }),0);//重新生成数组索引 如果(计数($arr)>2){ $count=计数($arr); $_sub=explode('.',$count==4?$arr[3]:$arr[2]); $debug?print(((部件计数:{$count})”):false; 如果(计数($_sub)==2){//两级TLD $removed=阵列移位($arr); 如果($count==4){//得到一个子域作为域 $removed=阵列移位($arr); } $debug?print(“
\n”[*]两级TLD:”。join(“,$”sub)。”):false; }elseif(计数($\u sub)==1){//一级TLD $removed=array_shift($arr);//删除子域 如果(strlen($arr[0])==2&&$count==3){//TLD域必须是2个字母 阵列移动($arr,$removed); }elseif(strlen($arr[0])==3&&$count==3){ 阵列移动($arr,$removed); }否则{ //根据IANA的非国家TLD $tlds=阵列( "航空",, “arpa”, "亚洲",, “生意”, “猫”, "com",, “合作社”, "edu",, "政府",, “信息”, “工作”, “mil”, "摩比",, “博物馆”, “姓名”, “净”, "组织",, "岗位",, "亲",, ‘电话’, “旅行”, “xxx”, ); 如果(count($arr)>2&&in_数组($\u sub[0],$TLD)!==false){//特殊TLD没有国家/地区 阵列移位($arr); } } $debug?打印(“
\n”。”[*]
array(2) {
[0]=>
string(6) "domain"
[1]=>
string(3) "com"
}
$second_level_domains_regex = '/\.asn\.au$|\.com\.au$|\.net\.au$|\.id\.au$|\.org\.au$|\.edu\.au$|\.gov\.au$|\.csiro\.au$|\.act\.au$|\.nsw\.au$|\.nt\.au$|\.qld\.au$|\.sa\.au$|\.tas\.au$|\.vic\.au$|\.wa\.au$|\.co\.at$|\.or\.at$|\.priv\.at$|\.ac\.at$|\.avocat\.fr$|\.aeroport\.fr$|\.veterinaire\.fr$|\.co\.hu$|\.film\.hu$|\.lakas\.hu$|\.ingatlan\.hu$|\.sport\.hu$|\.hotel\.hu$|\.ac\.nz$|\.co\.nz$|\.geek\.nz$|\.gen\.nz$|\.kiwi\.nz$|\.maori\.nz$|\.net\.nz$|\.org\.nz$|\.school\.nz$|\.cri\.nz$|\.govt\.nz$|\.health\.nz$|\.iwi\.nz$|\.mil\.nz$|\.parliament\.nz$|\.ac\.za$|\.gov\.za$|\.law\.za$|\.mil\.za$|\.nom\.za$|\.school\.za$|\.net\.za$|\.co\.uk$|\.org\.uk$|\.me\.uk$|\.ltd\.uk$|\.plc\.uk$|\.net\.uk$|\.sch\.uk$|\.ac\.uk$|\.gov\.uk$|\.mod\.uk$|\.mil\.uk$|\.nhs\.uk$|\.police\.uk$/';
$domain = $_SERVER['HTTP_HOST'];
$domain = explode('.', $domain);
$domain = array_reverse($domain);
if (preg_match($second_level_domains_regex, $_SERVER['HTTP_HOST']) {
$domain = "$domain[2].$domain[1].$domain[0]";
} else {
$domain = "$domain[1].$domain[0]";
}
// Per Wikipedia: "All ASCII ccTLD identifiers are two letters long,
// and all two-letter top-level domains are ccTLDs."
function topDomainFromURL($url) {
$url_parts = parse_url($url);
$domain_parts = explode('.', $url_parts['host']);
if (strlen(end($domain_parts)) == 2 ) {
// ccTLD here, get last three parts
$top_domain_parts = array_slice($domain_parts, -3);
} else {
$top_domain_parts = array_slice($domain_parts, -2);
}
$top_domain = implode('.', $top_domain_parts);
return $top_domain;
}
function get_domain($domain, $debug = false){
$original = $domain = strtolower($domain);
if (filter_var($domain, FILTER_VALIDATE_IP)) {
return $domain;
}
$debug ? print('<strong style="color:green">»</strong> Parsing: '.$original) : false;
$arr = array_slice(array_filter(explode('.', $domain, 4), function($value){
return $value !== 'www';
}), 0); //rebuild array indexes
if (count($arr) > 2){
$count = count($arr);
$_sub = explode('.', $count === 4 ? $arr[3] : $arr[2]);
$debug ? print(" (parts count: {$count})") : false;
if (count($_sub) === 2){ // two level TLD
$removed = array_shift($arr);
if ($count === 4){ // got a subdomain acting as a domain
$removed = array_shift($arr);
}
$debug ? print("<br>\n" . '[*] Two level TLD: <strong>' . join('.', $_sub) . '</strong> ') : false;
}elseif (count($_sub) === 1){ // one level TLD
$removed = array_shift($arr); //remove the subdomain
if (strlen($arr[0]) === 2 && $count === 3){ // TLD domain must be 2 letters
array_unshift($arr, $removed);
}elseif(strlen($arr[0]) === 3 && $count === 3){
array_unshift($arr, $removed);
}else{
// non country TLD according to IANA
$tlds = array(
'aero',
'arpa',
'asia',
'biz',
'cat',
'com',
'coop',
'edu',
'gov',
'info',
'jobs',
'mil',
'mobi',
'museum',
'name',
'net',
'org',
'post',
'pro',
'tel',
'travel',
'xxx',
);
if (count($arr) > 2 && in_array($_sub[0], $tlds) !== false){ //special TLD don't have a country
array_shift($arr);
}
}
$debug ? print("<br>\n" .'[*] One level TLD: <strong>'.join('.', $_sub).'</strong> ') : false;
}else{ // more than 3 levels, something is wrong
for ($i = count($_sub); $i > 1; $i--){
$removed = array_shift($arr);
}
$debug ? print("<br>\n" . '[*] Three level TLD: <strong>' . join('.', $_sub) . '</strong> ') : false;
}
}elseif (count($arr) === 2){
$arr0 = array_shift($arr);
if (strpos(join('.', $arr), '.') === false && in_array($arr[0], array('localhost','test','invalid')) === false){ // not a reserved domain
$debug ? print("<br>\n" .'Seems invalid domain: <strong>'.join('.', $arr).'</strong> re-adding: <strong>'.$arr0.'</strong> ') : false;
// seems invalid domain, restore it
array_unshift($arr, $arr0);
}
}
$debug ? print("<br>\n".'<strong style="color:gray">«</strong> Done parsing: <span style="color:red">' . $original . '</span> as <span style="color:blue">'. join('.', $arr) ."</span><br>\n") : false;
return join('.', $arr);
}
function get_domaininfo($url) {
// regex can be replaced with parse_url
preg_match("/^(https|http|ftp):\/\/(.*?)\//", "$url/" , $matches);
$parts = explode(".", $matches[2]);
$tld = array_pop($parts);
$host = array_pop($parts);
if ( strlen($tld) == 2 && strlen($host) <= 3 ) {
$tld = "$host.$tld";
$host = array_pop($parts);
}
return array(
'protocol' => $matches[1],
'subdomain' => implode(".", $parts),
'domain' => "$host.$tld",
'host'=>$host,'tld'=>$tld
);
}
print_r(get_domaininfo('http://mysubdomain.domain.co.uk/index.php'));
Array
(
[protocol] => https
[subdomain] => mysubdomain
[domain] => domain.co.uk
[host] => domain
[tld] => co.uk
)
function strip_subdomains($url){
# credits to gavingmiller for maintaining this list
$second_level_domains = file_get_contents("https://raw.githubusercontent.com/gavingmiller/second-level-domains/master/SLDs.csv");
# presume sld first ...
$possible_sld = implode('.', array_slice(explode('.', $url), -2));
# and then verify it
if (strpos($second_level_domains, $possible_sld)){
return implode('.', array_slice(explode('.', $url), -3));
} else {
return implode('.', array_slice(explode('.', $url), -2));
}
}
<?php
$host = $_SERVER['HTTP_HOST'];
preg_match("/[^\.\/]+\.[^\.\/]+$/", $host, $matches);
echo "domain name is: {$matches[0]}\n";
?>
preg_match('/(www.)?([^.]+\.[^.]+)$/', $yourHost, $matches);
echo "domain name is: {$matches[0]}\n";
echo getDomainOnly("http://example.com/foo/bar");
function getDomainOnly($host){
$host = strtolower(trim($host));
$host = ltrim(str_replace("http://","",str_replace("https://","",$host)),"www.");
$count = substr_count($host, '.');
if($count === 2){
if(strlen(explode('.', $host)[1]) > 3) $host = explode('.', $host, 2)[1];
} else if($count > 2){
$host = getDomainOnly(explode('.', $host, 2)[1]);
}
$host = explode('/',$host);
return $host[0];
}
function get_domain_regex($url){
$pieces = parse_url($url);
$domain = isset($pieces['host']) ? $pieces['host'] : '';
if (preg_match('/(?P<domain>[a-z0-9][a-z0-9\-]{1,63}\.[a-z\.]{2,6})$/i', $domain, $regs)) {
return $regs['domain'];
}else{
return false;
}
}
function get_domain($url){
$parseUrl = parse_url($url);
$host = $parseUrl['host'];
$host_array = explode(".", $host);
$domain = $host_array[count($host_array)-2] . "." . $host_array[count($host_array)-1];
return $domain;
}
(?:\.co)?(?:\.com)?(?:\.gov)?(?:\.net)?(?:\.org)?(?:\.id)?
function get_domain_name($url){
$pieces = parse_url($url);
$domain = isset($pieces['host']) ? $pieces['host'] : $url;
$domain = strtolower($domain);
$domain = preg_replace('/.international$/', '.com', $domain);
if (preg_match('/(?P<domain>[a-z0-9][a-z0-9\-]{1,90}\.[a-z\.]{2,6})$/i', $domain, $regs)) {
if (preg_match('/(.*?)((?:\.co)?(?:\.com)?(?:\.gov)?(?:\.net)?(?:\.org)?(?:\.id)?(?:\.asn)?.[a-z]{2,6})$/i', $regs['domain'], $matches)) {
return $matches[1];
}else return $regs['domain'];
}else{
return $url;
}
}
$url = https://use.fontawesome.com/releases/v5.11.2/css/all.css?ver=2.7.5
$handle = pathinfo( parse_url( $url )['host'] )['filename'];
$final_handle = substr( $handle , strpos( $handle , '.' ) + 1 );
print_r($final_handle); // fontawesome
@preg_replace('#\/(.)*#', '', @preg_replace('#^https?://(www.)?#', '', $url))
function getDomain($url){
$pieces = parse_url($url);
$domain = isset($pieces['host']) ? $pieces['host'] : '';
if(preg_match('/(?P<domain>[a-z0-9][a-z0-9\-]{1,63}\.[a-z\.]{2,6})$/i', $domain, $regs)){
return $regs['domain'];
}
return FALSE;
}
echo getDomain("http://example.com"); // outputs 'example.com'
echo getDomain("http://www.example.com"); // outputs 'example.com'
echo getDomain("http://mail.example.co.uk"); // outputs 'example.co.uk'