public function post_exists( $post_name, $post_type='post' ) {
		global $wpdb;

		$query = "SELECT ID FROM $wpdb->posts WHERE 1=1";
		$args = array();

		if ( !empty ( $post_name ) ) {
			 $query .= " AND post_name LIKE '%s' ";
			 $args[] = $post_name;
		}
		if ( !empty ( $post_type ) ) {
			 $query .= " AND post_type = '%s' ";
			 $args[] = $post_type;
		}

		if ( !empty ( $args ) )
			 return $wpdb->get_var( $wpdb->prepare($query, $args) );

		return true;
	}