如何使用CodeIgniter中的header()函数刷新页面并重定向到另一个页面

I am able to refresh a page using normal PHP. How do I do this with CodeIgniter?

I was trying this in PHP:

<html>
<title>Thank You</title>
<body bgcolor="#E6E6FA">
  <center>
    <h1>Thank You For Visiting...Wish you to visit again...</h1>
  </center>
  <?php
    header(refresh:5; url="login_input.php");
  ?>
</body>
</html>

I know to I have to write this:

"<?php echo base_url();?>index.php/welcome/"

But where?

Do I have to create functions in model and controller to do this?

Thank you everyone for replying...And many thanks to Mr. Dan Belden for providing the link to gather knowledge.

Actually the desired code which I was looking for is as follows...

<html>
<title>Thank You</title>
<head>
<meta HTTP-EQUIV="REFRESH" content="5; url=<?php echo    
base_url();?>index.php/welcome/login">
</head>
<body bgcolor="#E6E6FA">
<br><br><br><br><br><br><br><br><br><br><br><br><br><br><br>
<center><h1>Thank You For Visiting...Wish you to visit again.......  
</h1></center>
</body>
</html>