PHP implements 301 permanent redirects and 302 temporary redirects

The principle of implementing redirection is simple: The Web server returns an HTTP header to the Liu Visitor, and the function of PHP sending the HTTP header is implemented by the header () function. 301, 302, 404 These Status codes are agreed in the HTTP protocol, so don't break the casserole to ask "why 301 instead of 3001". Get back to the point.

PHP 301 Redirect:

The code is as follows
Header (' http/1.1 moved Permanently '); Header ("location:http://www.hzhuti.com/"); Exit ();

Or

The code is as follows

<?php 301 Permanent Redirect $http _protocol = $_server[' Server_protocol ']; HTTP protocol version If it is a different protocol, the default is http/1.0 if (' http/1.1 '!= $http _protocol && ' http/1.0 '!= $http _protocol) $http _protocol = ' http/1.0 '; Response 301 Status Code Header ("$http _protocol moved Permanently"); Specify the redirected URL $new _url = ' http://www.111cn.net/'; Header ("Location: $new _url"); ?>

PHP 302 Redirect:

The code is as follows
Header ("location:http://www. ") Hzhuti. com/"); Exit ();

Along with the PHP 404 error also included:

The code is as follows
Header ("http/1.1 404 Not Found"); Exit ();

Here's a little bit about PHP 301 and 302 redirects here, and here's the Apache approach

Cases:

Apache

The code is as follows
Redirect 301/old/old.htm http://www.111cn.net/new.htm Redirect Permanent/one Http://111cn.net/two Redirectmatch (. *). gif$ $1.jpg

2. Use mod_rewrite to rewrite URL method

Apache

The code is as follows
Options +followsymlinks Rewriteengine on Rewritecond%{http_host} ^111cn.net Rewriterule ^ (. *) $ http://www.111cn.net/$1 [r=permanent,l]

About Apache htaccess here is not a reference to the mod_rewrite rewrite the URL way is almost exactly the same OH.