The most efficient method for webpages redirection is 301 redirect. The code 301 means “moved permanently”. Here we have an example for php 301 redirect
<?
Header( "HTTP/1.1 301 Moved Permanently" );
Header( "Location: http://www.new-website.com" );
?>
The following php code redirects the user to /index.php within the same site:
<? header('Location: /index.php'); ?>
The following code must be found between the head tags of the page
<META http-equiv=”refresh” content=”5;URL=http://mywebsite.com”>