Domain Redirection

I am using a domain from last 1 year and its having good link popularity and also indexed my search engine.

now i am having a new domain i want that visitor to get view my website frm new domain.

which redirection method should i use , so that its good for SEO point of view and SEs tansfer my linkpopularity to my new domain and index it fast.
i new website is hosted on different machine with different IP.

Should i go for 301 with htaccess or should i write this simple code on my index.php file of my old website.

<?
Header( "HTTP/1.1 301 Moved Permanently" );
Header( "Location: http://www.newdomain.com" );
?>

And one last thing for how many days i hav to hav this redirection code there so that SEs replace my old domain with new domain.

Please sugest.

 

It would be better if you create a .htaccess file.

 

Yep, you need to create or locate a .htaccess file on your server. Your .htaccess file will give search engine robots instructions on security and redirects.

 

Can i please hav that htaccess code and please let me know how many days i have to put that redirection code there

 

.htaccess file works the best

 

Are you on a apache server?

Redirect 301 [FONT=Arial][SIZE=2] /old/old.htm http://www.you.com/new.htm[/SIZE][/FONT]

Code (markup):