如果您需要 php 解决方案,您可以在执行任何其他代码之前调用此函数(在主 index.php 的顶部。
我使用它来重新路由 codeigniter url,而不会保留重复的 url 如果你使用 routes.php 会发生什么
对于那些想知道为什么的人? Google 喜欢 301 重定向,讨厌双重内容。 Codeigniter 有一个很好的功能来制作你自己的“路线”,所以你可以在需要的地方使用你自己的 url。问题是,原始的“不需要/丑陋”的 url 仍然可以访问,如果谷歌发现了这一点,你的页面在 seo 排名中会急剧下降。
发现这一点后,我试图在 codeigniter 中发现任何类型的 301 重定向功能,但每次都碰壁,并且 .htaccess 重定向会随着时间的推移而失败(而且我不是唯一一个,stackoverflow 充满了它)
所以这就是我决定写这篇文章的原因,同时牢记速度,尽可能少“花哨的操作”来完成工作。
您必须在 codeigniter 的第一个 index.php 文件的最顶部添加这些行
require ('myobjects_x.php');
redirecttoHTTPS();
我已经调用了下面的文件 myobjects_x.php 并将它保存在我的基本目录中,其中 codeigniter 的第一个 index.php 文件是。
/* Codeigniter 301 reroute script written by Michael Dibbets
* Copyright 2012 by Michael Dibbets
* http://www.facebook.com/michael.dibbets - mdibbets[at]outlook.com
* Licenced under the MIT license http://opensource.org/licenses/MIT
*/
function redirectToHTTPS()
{
// remove this if you don't need to redirect everyone to https
if($_SERVER['HTTPS']!=="on")
{
$redirect= "https://".$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI'];
header( "Status: 301 Moved Permanently" );
header("Location: $redirect");
exit(0);
}
// get the request url
$uri = urldecode($_SERVER['REQUEST_URI']);
// check for unwanted trailing slashes.
// if they exist redirect our visitor.
// we want urls without trailing slashes so we don't need to to check the same url twice
if($uri !== '/')
{
$slash = substr($uri, strlen($uri)-1, 1);
if($slash === '/')
{
$uri = substr($uri, 0, strlen($uri)-1);
$redirect= "https://".$_SERVER['HTTP_HOST'].''.$uri;
header( "Status: 301 Moved Permanently" );
header("Location: $redirect");
exit(0);
}
}
// if we have double slashes in our url for whatever reason replace them with single slashes
if(strpos($uri,'//') !== false)
{
$uri = str_replace('//','/',$uri);
$redirect= "https://".$_SERVER['HTTP_HOST'].''.$uri;
header( "Status: 301 Moved Permanently" );
header("Location: $redirect");
exit(0);
}
$urilistcount = 0;
//Just keep copy pasting this. In the orig you do the url without domain to check.
// The code checks the begin of the url, and if it matches it'll append anything that was
// behind the part you wanted to check. for example
// $urilist[$urilistcount]['orig'] = '/pressrelease/82/something';
// $urilist[$urilistcount]['good'] = 'http://www.domain.com/hereweare';
// $urilistcount++;
// will cause /pressrelease/82/something/we-have-something-to-say to reroute to
// http://www.domain.com/hereweare/we-have-something-to-say
//
// So make sure that your "top level" that's likely to match to a lot of sub pages
// is placed last in the array, and that the sub pages you want different reroute urls for route first
// When an route is encountered, processing stops at that point.
// Copy paste from here and add below it
$urilist[$urilistcount]['orig'] = '/pressrelease/82/something';
$urilist[$urilistcount]['good'] = 'https://www.domain.com/media/pressrelease/31/somewhereinteresting-with-an-title-in-url-for-seo';
$urilistcount++;
// End copy and paste
for($c=0;$c < $urilistcount;$c++)
{
if(strpos($uri,$urilist[$c]['orig'])===0)
{
$tmpx = strlen($urilist[$c]['orig']);
$tmpy = strlen($urilist[$c]['good']);
if($tmpx != $tmpy)
{
$tmpz = substr($uri,$tmpx);
// special check to replace dashes to underscores
// only when this word appears in the string to append.
if(strpos($tmpz,'/iamadash-')===0)
{
$tmpz = str_replace('-','_',$tmpz);
}
// add the extra variables to the good url.
$urilist[$c]['good'] .= $tmpz;
}
header("Status: 301 Moved Permanently" );
header("Location: " . $urilist[$c]['good']);
exit(0);
}
}
unset($urilist);
}
// filter out bad urls character/strings that cause codeigniter to break
function CIsafeurl($string)
{
return str_replace(array('&','‘','’ ','&','=','+','*','%','’',';','\'','!',',',':',' ','(',')','[',']','?','--','/'),array('-','','','-','','','','','','','','','','','-','','','','','','-','-'),$string);
}