Considerations for 301/404 redirection in php header

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.