i have a strange problem. when i include php file above html tags then its all right
but when i include my header (php file) after html tags then i got this symbol
on browser 
my code when i got this symbol is
Expand|Select|Wrap|Line Numbers
- <html>
- <head>
- <title>title</title>
- <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
- <link href="css/style.css" rel="stylesheet" type="text/css">
- </head>
- <body>
- <? include("includes/top.php"); ?>