search
HomeBackend DevelopmentPHP Tutorialphp获取根域名方法汇总_PHP

本文实例汇总了php获取根域名方法,分享给大家供大家参考。具体实现方法如下:

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,下面就来看看几个具体实例。

如果是获取当前域名是非常的简单的:

代码如下:

//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];
    }
    return $re_domain;
}

希望本文所述对大家的php程序设计有所帮助。

Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Optimize PHP Code: Reducing Memory Usage & Execution TimeOptimize PHP Code: Reducing Memory Usage & Execution TimeMay 10, 2025 am 12:04 AM

TooptimizePHPcodeforreducedmemoryusageandexecutiontime,followthesesteps:1)Usereferencesinsteadofcopyinglargedatastructurestoreducememoryconsumption.2)LeveragePHP'sbuilt-infunctionslikearray_mapforfasterexecution.3)Implementcachingmechanisms,suchasAPC

PHP Email: Step-by-Step Sending GuidePHP Email: Step-by-Step Sending GuideMay 09, 2025 am 12:14 AM

PHPisusedforsendingemailsduetoitsintegrationwithservermailservicesandexternalSMTPproviders,automatingnotificationsandmarketingcampaigns.1)SetupyourPHPenvironmentwithawebserverandPHP,ensuringthemailfunctionisenabled.2)UseabasicscriptwithPHP'smailfunct

How to Send Email via PHP: Examples & CodeHow to Send Email via PHP: Examples & CodeMay 09, 2025 am 12:13 AM

The best way to send emails is to use the PHPMailer library. 1) Using the mail() function is simple but unreliable, which may cause emails to enter spam or cannot be delivered. 2) PHPMailer provides better control and reliability, and supports HTML mail, attachments and SMTP authentication. 3) Make sure SMTP settings are configured correctly and encryption (such as STARTTLS or SSL/TLS) is used to enhance security. 4) For large amounts of emails, consider using a mail queue system to optimize performance.

Advanced PHP Email: Custom Headers & FeaturesAdvanced PHP Email: Custom Headers & FeaturesMay 09, 2025 am 12:13 AM

CustomheadersandadvancedfeaturesinPHPemailenhancefunctionalityandreliability.1)Customheadersaddmetadatafortrackingandcategorization.2)HTMLemailsallowformattingandinteractivity.3)AttachmentscanbesentusinglibrarieslikePHPMailer.4)SMTPauthenticationimpr

Guide to Sending Emails with PHP & SMTPGuide to Sending Emails with PHP & SMTPMay 09, 2025 am 12:06 AM

Sending mail using PHP and SMTP can be achieved through the PHPMailer library. 1) Install and configure PHPMailer, 2) Set SMTP server details, 3) Define the email content, 4) Send emails and handle errors. Use this method to ensure the reliability and security of emails.

What is the best way to send an email using PHP?What is the best way to send an email using PHP?May 08, 2025 am 12:21 AM

ThebestapproachforsendingemailsinPHPisusingthePHPMailerlibraryduetoitsreliability,featurerichness,andeaseofuse.PHPMailersupportsSMTP,providesdetailederrorhandling,allowssendingHTMLandplaintextemails,supportsattachments,andenhancessecurity.Foroptimalu

Best Practices for Dependency Injection in PHPBest Practices for Dependency Injection in PHPMay 08, 2025 am 12:21 AM

The reason for using Dependency Injection (DI) is that it promotes loose coupling, testability, and maintainability of the code. 1) Use constructor to inject dependencies, 2) Avoid using service locators, 3) Use dependency injection containers to manage dependencies, 4) Improve testability through injecting dependencies, 5) Avoid over-injection dependencies, 6) Consider the impact of DI on performance.

PHP performance tuning tips and tricksPHP performance tuning tips and tricksMay 08, 2025 am 12:20 AM

PHPperformancetuningiscrucialbecauseitenhancesspeedandefficiency,whicharevitalforwebapplications.1)CachingwithAPCureducesdatabaseloadandimprovesresponsetimes.2)Optimizingdatabasequeriesbyselectingnecessarycolumnsandusingindexingspeedsupdataretrieval.

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

DVWA

DVWA

Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software

VSCode Windows 64-bit Download

VSCode Windows 64-bit Download

A free and powerful IDE editor launched by Microsoft

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

Atom editor mac version download

Atom editor mac version download

The most popular open source editor

SAP NetWeaver Server Adapter for Eclipse

SAP NetWeaver Server Adapter for Eclipse

Integrate Eclipse with SAP NetWeaver application server.