Summary of methods for obtaining the root domain name in PHP_PHP tutorial

A summary of how to get the root domain name in php

If you simply get the domain name currently visiting your page, we only need to use the function HTTP_HOST in php to get it done. If it is to extract The url root domain name needs to be regular. Let’s take a look at a few specific examples.

It is very simple to obtain the current domain name:

The code is as follows:

　

//Get the current domain name:

echo $_SERVER['SERVER_NAME'];

//Get the source URL, that is, click to go to the previous page URL of this page

echo $_SERVER["HTTP_REFERER"];

　$_SERVER['REQUEST_URI'];//Get the suffix of the current domain name

　$_SERVER['HTTP_HOST'];//Get the current domain name

　dirname(__FILE__);//Get the physical path of the current file

　dirname(__FILE__)."/../";//Get the upper-level physical path of the current file

　?>

Example 1

The code is as follows:

Function getUrlRoot($url){

　#Add head and tail

　$url = $url . "/";

　#Judge domain name

preg_match("/((w*)://)?w*.?([w|-]*.(com.cn|net.cn|gov.cn|org.cn|com|net| cn|org|asia|tel|mobi|me|tv|biz|cc|name|info))

//", $url, $ohurl);

　#Judge IP

　if($ohurl[3] == ''){

preg_match("/((d+.){3}d+)//", $url, $ohip);

return $ohip[1];

　}

return $ohurl[3];

　}

Example 2

The code is as follows:

　/**

* Obtain root domain name

* @param type $domain domain name

* @return string Returns the root domain name

*/

Function GetUrlToDomain($domain) {

$re_domain = '';

　$domain_postfix_cn_array = array("com", "net", "org", "gov", "edu", "com.cn", "cn");

$array_domain = explode(".", $domain);

　$array_num = count($array_domain) - 1;

　if ($array_domain[$array_num] == 'cn') {

　if (in_array($array_domain[$array_num - 1], $domain_postfix_cn_array)) {

　$re_domain = $array_domain[$array_num - 2] . "." . $array_domain[$array_num - 1] . "." . $array_domain[$array_num];

　} else {

　$re_domain = $array_domain[$array_num - 1] . "." . $array_domain[$array_num];

　}

　} else {

　$re_domain = $array_domain[$array_num - 1] . "." . $array_domain[$array_num];

　}

return $re_domain;

　}

http://www.bkjia.com/PHPjc/903236.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/903236.htmlTechArticleSummary of php methods to obtain the root domain name. If you only simply obtain the domain name currently visiting your page, we only need to use php The function HTTP_HOST can be done. If you want to extract the url root domain name, it is...