Get Number Of Subscribers In Plain Text Without Using CURL

Add the line bellow to functions.php file inside your theme. Change the feedId variable with your feedburner ID.

function rssCount(){
	$feedId = 'feedburner_id';
	$contents = file_get_contents("https://feedburner.google.com/api/awareness/1.0/GetFeedData?uri=$feedId");
	$pattern= "/(?<=circulation=['|\"])[^'|\"]*?(?=['|\"])/i";
	preg_match($pattern, $contents, $thePath);
	return $thePath[0];
}

Now wherever you want to show the number of subscribers put the next code.

echo rssCount();

Notice: You need to activate the awareness api in your feedburner account (check the pic bellow).