Php implements 301 redirection jump code

I. This method is recommended because it transfers all the original URLs of www.111cn.net to the new address of 111cn.net.

The code is as follows:	Copy code
<? Php $ The_host = $ _ SERVER ['http _ host']; $ Request_uri = isset ($ _ SERVER ['request _ URI '])? $ _ SERVER ['request _ URI ']: ''; If ($ the_host = 'www .111cn.net ') { Header ('http/1.1 301 Moved Permanently '); Header ('Location: http://111cn.net '. $ request_uri );// } ?>

2. Single-page multi-site Php301 redirection code, www.111cn.net and 111cn.net are 301 to index. php, and www.111cn.net is 301 to 111cn.net; otherwise, the code is redirected to the error page.

The code is as follows:	Copy code
If ($ HTTP_HOST = "www.111cn.net") or ($ HTTP_HOST = "111cn.net ")) { Header ("HTTP/1.1 301 Moved Permanently "); Header ("Location:/index. php "); } Elseif ($ HTTP_HOST = "www.111cn.net ") { Header ("HTTP/1.1 301 Moved Permanently "); Header ("Location: http://111cn.net "); } Else { Header ("Location:/404.htm "); } ?>

Attach other redirection methods

The code is as follows:

Copy code

// Define the encoding Header ('content-Type: text/html; charset = utf-8 '); // Atom Header ('content-type: application/atom + XML '); // CSS Header ('content-type: text/css '); // Javascript Header ('content-type: text/javascript '); // JPEG Image Header ('content-type: image/jpeg '); // JSON Header ('content-type: application/json '); // PDF Header ('content-type: application/pdf '); // RSS Header ('content-Type: application/rss + xml; charset = ISO-8859-1 '); // Text (Plain) Header ('content-type: text/plain '); // XML Header ('content-type: text/XML '); // OK Header ('http/1.1 200 OK '); // Set a 404 header: Header ('http/1.1 404 Not Found '); // Set the address to be permanently redirected Header ('http/1.1 301 Moved Permanently '); // Go to a new address Header ('Location: http://www.example.org /'); // File delay redirection: Header ('refresh: 10; url = http://www.example.org /'); Print 'You will be redirected in 10 seconds '; // Of course, you can also use html syntax to implement // <Meta http-equiv = "refresh" content = "10; http://www.example.org //> // Override X-Powered-By: PHP: Header ('x-Powered-By: PHP/4.4.0 '); Header ('x-Powered-By: Brain/0.6b '); // Document language Header ('content-language: en '); // Tell the browser the last modification time $ Time = time ()-60; // or filemtime ($ fn), etc Header ('last-Modified: '. gmdate ('d, d m y h: I: S', $ time). 'Gmt '); // Tell the browser that the document content has not changed Header ('http/1.1 304 Not modified '); // Set the content length Header ('content-Length: 1234 '); // Set it to a download type Header ('content-Type: application/octet-stream '); Header ('content-Disposition: attachment; filename = "example.zip "'); Header ('content-Transfer-Encoding: binary '); // Load the file to send: Readfile('example.zip '); // Disable caching for the current document Header ('cache-Control: no-Cache, no-store, max-age = 0, must-revalidate '); Header ('expires: Mon, 26 Jul 1997 05:00:00 GMT'); // Date in the past Header ('pragma: no-cache '); // Set the content type: Header ('content-Type: text/html; charset = ISO-8859-1 '); Header ('content-Type: text/html; charset = utf-8 '); Header ('content-Type: text/plain '); // plain text format Header ('content-Type: image/jpeg '); // JPG *** Header ('content-Type: application/zip'); // zip file Header ('content-Type: application/pdf '); // pdf file Header ('content-Type: audio/mpeg '); // audio File Header ('content-Type: application/x-shockw ** e-Flash'); // flash animation // Display the login dialog box Header ('http/1.1 401 unauthorized '); Header ('www-Authenticate: Basic realm = "Top Secret "'); Print 'text that will be displayed if the user hits cancel or '; Print 'enters wrong login data ';

Pay attention to the following points to help solve some problems that beginners often encounter.
1. There must be no space between location and:. Otherwise, an error will occur.
2. There cannot be any output before using the header.
3. The PHP code after the header is executed.