大佬教程收集整理的这篇文章主要介绍了php强制用户转向www域名的方法,大佬教程大佬觉得挺不错的,现在分享给大家,也给大家做个参考。
本文实例讲述了PHP强制用户转向www域名的方法。分享给大家供大家参考。具体分析如下:
有时候网站的www域名和非www域名都能访问网站,但是这样不利于搜索引擎的收录,会分散网页的权重,所以希望用户访问非www的域名时通过301永久重定向到www域名,例如用户访问code.cc会直接转向code.js-code.com,本PHP代码考虑了无法通过head重定向的情况,会在页面上输出链接,让用户点击。
php;"> // Install info.: // Copy and paste these lines into your default index.PHP or // the file that get's called if a visitor comes on your // website... // read the host from the server environment $host = $_SERVER["http_HOST"]; // fix host name - we never Now... ;-) $host = strtolower($host); $host = trim($host); // This is important: // Webbrowsers like Firefox are doing their request without // the port number like "code.js-code.com" but some other // applications send host names like "code.js-code.com:80" $host = str_replace(':80','',$host); $host = trim($host); // if the host is not starTing with www. redirect the // user to the same URL but with www :-) if ($host != 'code.js-code.com'){ // You an also change the "!=" to "==",if you want to force // the user to use the domain name without the www. // send status header,so that search @R_616_10846@nes or other services // detect that this is a peRMANent redirect and not a temporary header('http/1.1 301 Moved PeRMANently'); // read the URL the user requested: $url = isset($_SERVER["requEST_URI"]) ? $_SERVER["requEST_URI"] : ''; // redirect the user to the new desTination: header('LOCATIOn: //code.js-code.com' . $url); // Convert "special" chars -- cause we never Now... ;-) $url = htmlspecialchars($url); // "fallBACk" link,if the browser is not supporTing header redirects print ''; // stop the script execution here exit; } // If the domain is code.js-code.com then go on with your PHP code // of with your website... // BTW: You need to replace code.cc trough your own domain :-D
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