$header='<style type ="text/css">
#header{
background-color:white;
color:#009900;
border-style:solid;
border-width:3px;
height:200px;
width:300px;
padding:5px;}</style><div id="header">WELCOME</div>';
if i use this type everything is displayed correctly but when updating it iam getting error 
is it the correct way to store in db or i have to use 

$header='<link rel="stylesheet" type="text/css" href="abc.css"> <div id="header">WELCOME</div>';