How to redirect 301 on DEDECMS homepage

How to 301 redirect the DEDECMS homepage?

DEDECMS homepage 301 redirect, redirect the main domain name without www to the main domain name with www

Recommended learning: 梦Weavercms

//主域名301跳转到www   
$redirect301=1; //301跳转开关，1代表打开，0代表关闭   
$index_file='index.html'; //指定网站默认首页文件，DeDeCMS设置为index.html，不支持SSI（shtml/shtm）   
if(substr($_SERVER['SERVER_NAME'],0,4)!='www.'&&$redirect301) //判断URL中是否带www   
{   
header('HTTP/1.1 301 Moved Permanently');   
header('Location:http://www.'.$_SERVER['SERVER_NAME']); //301跳转到www   
exit();   
}

Add the above code to the top of

if(!file_exists(dirname(__FILE__).'/data/common.inc.php'))

in index.php on the homepage.

But please note: If your default homepage index.html is ranked above index.php, then the above method will not work.

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