Get WordPress Current Page Slug / Parent Slug / Parent ID

wordpress-id-slug-functions.php

<?php

	function the_parent_slug() {
		global $post;
		if($post->post_parent == 0) return '';
		$post_data = get_post($post->post_parent);
		return $post_data->post_name;
	}

	function the_current_page_slug() {
		global $post;
		return $post->post_name;
	}
	function the_parent_page_id() {
		global $post;
		$parent_page_id_is = get_post($post->post_parent);
		return $parent_page_id_is->ID;
	}

?>