如果你只简单获取当前访问你页面的域名,我们只需要使用php中的函数HTTP_HOST就可以搞定了,如果是提取url根域名是需要正则的,下面看我整理的几个例子.
如果是获取当前域名是非常的简单的,代码如下:
<?php //获取当前的域名: echo $_SERVER['SERVER_NAME']; //获取来源网址,即点击来到本页的上页网址 echo $_SERVER["HTTP_REFERER"]; $_SERVER['REQUEST_URI'];//获取当前域名的后缀 $_SERVER['HTTP_HOST'];//获取当前域名 dirname(__FILE__);//获取当前文件的物理路径 dirname(__FILE__)."/../";//获取当前文件的上一级物理路径
例子1,代码如下:
function getUrlRoot($url){ #添加头部和尾巴 $url = $url . "/"; #判断域名 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, $ohurl); #判断IP if($ohurl[3] == ''){ preg_match("/((\d+\.){3}\d+)\//", $url, $ohip); return $ohip[1]; } return $ohurl[3]; }
例子2,代码如下:
/** * 取得根域名 * @param type $domain 域名 * @return string 返回根域名 */ function GetUrlToDomain($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];//开源代码phprm.com } return $re_domain; }
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