PHP newbie, please tell me how to jump to a web page based on the domain name?

Question

3 top-level domain names

www.123.com

www.pass.cn

www.sohu.cn

Different domain names, I want to automatically go to different subdirectories.

www.123.com/doc

www.pass.cn/soft

www.sohu .cn/video

Please give me some advice, how to write the PHP code for this homepage?

Answer 1

Please give me some guidance.

Answer 2

Stupid method

$_http = $_SERVER['HTTP_HOST'];

if($_http == 'www.123.com'){

header("LOCATION：http://www.123.com/doc");

}elseif($_http == "pass"){

// Same as above

}elseif(xxxx){

//Same as above

}else{

echo "Incorrect address input";

}