wp-blog-header.php problem in external html

Hello,

I have a WP in a directory (eg. /wp/)
The domain is https://www.example.com (for example).

I have implement some fuctions from WP to my main index.html file. To be specific I parse the Featured Images from the 20 latest posts.

Code is this:

Above the HTML tag

<?

define('WP_USE_THEMES', false);
include('wp/wp-blog-header.php'); <-- Cause WSOD + strange Characters
//include('/wp/wp-blog-header.php');  <--- NO WSOD But The code doesn't work
//include(dirname(__FILE__) .'/wp/wp-blog-header.php'); <--- NO WSOD But The code doesn't work
//include($_SERVER['DOCUMENT_ROOT'].'/wp/wp-blog-header.php'); <-- NO WSOD But The code doesn't work
?>

In Body Tag:

<?php
	$counterPost = 1;
  $thumbnails = get_posts('numberposts=6');
  foreach ($thumbnails as $thumbnail) {
    if ( has_post_thumbnail($thumbnail->ID)) {
		$counterPost ++;
      echo '<a href="' . get_permalink( $thumbnail->ID ) . '" title="' . esc_attr( $thumbnail->post_title ) . '">';
      echo get_the_post_thumbnail($thumbnail->ID, array(120,120));
      echo '</a>';
      echo '  ';
    }
    if ($counterPost % 2 != 0){
	echo '<br><br>';
	}
  }
?>

I have just update to the latest version and I have the following issue:

In https://www.example.com/ or https://www.example.com/index.html I have a White Screen of Death and some strange characters (like on this post: https://wordpress.stackexchange.com/questions/115219/strange-characters-appeared-in-header ) I am using include to bypass the require Fatal Error But I still got (Fatal) problem – a WSOD.

The most “fascinating thing” is that IF I try to access to my site like this: https://example.com/ or https://example.com/index.html –Without www– I didnt see any problem. As you can see the problem is only in the (www) .

Of course, I am using apache 2.2.x and WHM/Cpanel the latest, and the www is a symbolic link to public_html. I double check the permissions and everything is 644 and 755 for folders.

Also, I has some custom rewrite rules to redirect the traffic from non-www to www, but I have disabled it for testing reason, till the time that I can find a solution about that problem with the wp-blog-header.php.

Moreover, The MOST fascinating thing is that:
I have copied the index.html and I rename it to ind2.html. I tried to access the www.example.com/ind2.html and EVERYTHING works! I haven’t a WSOD, No Strange characters, Nothing.
These 2 files (index.html and ind2.html) are exactly the same.

Whats going on ?? Any thoughts? How can I fix it ??

Can you suggest me any other code to see the Feature images (and to be hyperlinked) in the external html page ?

PHP Error_log from root folder:

[18-Sep-2014 22:45:55 UTC] PHP Warning:  include(/wp/wp-blog-header.php): failed to open stream: No such file or directory in /home/(account)/public_html/domain.com/index.html on line 10
[18-Sep-2014 22:45:55 UTC] PHP Warning:  include(): Failed opening '/wp/wp-blog-header.php' for inclusion (include_path='.:/usr/lib/php:/usr/local/lib/php') in /home/(account)/public_html/domain.com/index.html on line 10

PHP Error log from wp folder: Empty .