Sequential number posts in Wordpress

function updateIndexNumbers($postid) {

	$post = get_post($postid);
	if ($post->post_type == 'project') {
		$args = array(
			'post_type' => 'project',
			'posts_per_page' => -1,
			'post_status' => 'publish',
			'order' => 'ASC',
			'orderby' => 'date'
		);

		$posts = get_posts($args);
		$count = 0;

		if ($posts) {
			foreach ($posts as $value) {
				$count++;
				add_post_meta($value->ID, 'incr_number', $count, true);
				update_post_meta($value->ID, 'incr_number', $count);
			}
		}
	}
}

add_action ( 'publish_post', 'updateIndexNumbers', 11 );
add_action ( 'deleted_post', 'updateIndexNumbers' );
add_action ( 'edit_post', 'updateIndexNumbers' );