<?php
// This is index.php
ob_start();
include 'tem/u.html';
ob_end_flush();
?>
<html>
<!-- This is u.html -->
<link rel="stylesheet" href="style.css" media="screen" />
<body>
<p> abc </p>
</body>
</html>
Now my problem is when i run h.html -> Ok with style.
But when i run index.php -> Ok without style (because now the index.php include style.css, not tem/style.css)
Need a fix
This has nothing to do with PHP or include. This has to do with your browser, and how URLs are interpreted.
When your browser is pointed at http://xyz.abc/tem/h.html and asked to load "style.css", it tries to load http://xyz.abc/tem/style.css - this is known as a relative url, relative to the current document location.
When your browser is at http://xyz.abc/index.php and is asked to load the stylesheet in the same way, it tries http://xyz.abc/style.css. Maybe you see the problem?
As for a solution, you might use a domain-relative path for the stylesheet ("/tem/style.css").
If possible, refer to a domain relative path to the style.css, for example
<link rel="stylesheet" href="/style.css" media="screen" />
If that is not possible, you need to keep track on the page base in some way, which I cannot tell because I do not know enough about your application. But anyway, like
<link rel="stylesheet" href="<?php echo $pageBase; ?>/style.css" media="screen" />
where $pageBase is a variable containing the url to the root of your application.
just always use absolute path to your css file
<link rel="stylesheet" href="/tem/style.css" media="screen" />
that's all