Considerations for 301/404 redirection in php header

If your webpage shows 301 or 404, it is a very serious problem for the user experience, so we must be careful when doing php header301 or 404, let me take a look.

301 jump

The Code is as follows:	Copy code
Header ('HTTP/1.1 301 Moved Permanently '); Header ('location: http://www.abc.com/aaa /'); Exit ();

Do not miss the header ('HTTP/1.1 301 Moved Permanently '); otherwise, no 301 is returned.

404 error page

The Code is as follows:	Copy code
Header ("HTTP/1.1 404 Not Found ");

If the above does not work, try the following:

The Code is as follows:	Copy code
Header ("Status: 404 Not Found ");

So to be foolproof, you can write either of the following two sentences:

The Code is as follows:	Copy code
Header ("HTTP/1.1 404 Not Found "); Header ("Status: 404 Not Found ");

TIPS,

After writing the code, we must use the webmaster tool to test whether the returned status is what we want.