Hello friends,
I am sure! Once or ever you must have been searching for a function in wordpress which can just convert your page name or post name into Page Id. Wow! I have the solution. Please try this code let me know your experiences.

function wt_get_ID_by_page_name($page_name)
{
	global $wpdb;
	$page_name_id = $wpdb->get_var("SELECT ID FROM $wpdb->posts WHERE post_name = '".$page_name."'");
	return $page_name_id;
}