php 从字符串中获取URL中获得域名
本教程主要主讲从字符串中得出url的域名部份，下面来看看吧。希望对我有帮助。
例如:http://www.phpfensi.com 得到 www.phpfensi.com
- function get_domain($url){
- $pattern = "/[w-] .(com|net|org|gov|cc|biz|info|cn)(.(cn|hk))*/";
- preg_match($pattern, $url, $matches);
- if(count($matches) > 0) {
- return $matches[0];
- }else{
- $rs = parse_url($url);
- $main_url = $rs["host"];
- if(!strcmp(long2ip(sprintf("%u",ip2long($main_url))),$main_url)) {
- return $main_url;
- }else{
- $arr = explode(".",$main_url);
- $count=count($arr);
- $endArr = array("com","net","org","3322");//com.cn net.cn 等情况
- if (in_array($arr[$count-2],$endArr)){
- $domain = $arr[$count-3].".".$arr[$count-2].".".$arr[$count-1];
- }else{
- $domain = $arr[$count-2].".".$arr[$count-1];
- }
- return $domain;
- }// end if(!strcmp...)
- }// end if(count...)
- }// end function