WP - Update post's taxonomy terms and slug programmatically (PHP, Wordpress)

gistfile1.txt

// List of post need to modify.
// $posts = array(
// 	array(
// 		'id' => 1,
// 		'term' => get_term_id_by_name(array('parent', 'child')),
// 		'taxonomy' => 'category',
// 	),
// 	array(
// 		'id' => 5,
// 		'term' => get_term_id_by_name(array('parent')),
// 		'taxonomy' => 'category',
// 	),
// );

// Fetch list of array from given .csv file
$rows   = array_map('str_getcsv', file('FILE_PATH/file.csv'));
$header = array_shift($rows);
$posts  = array();
foreach ($rows as $row) {
	$posts[] = array_combine($header, $row);
}

// Fetch term id from given term name.
function get_term_id_by_name($terms, $taxonomy = 'category', $parent = '')
{
	foreach ($terms as $term) {
		$term_id = term_exists($term, $taxonomy, $parent);
		$term_id_arr[] = $term_id['term_taxonomy_id'];
	}
	return $term_id_arr;
}

// Add terms in existing posts.
$run = 1;
if ($run == 1) {
	foreach ($posts as $post) {

		$post_id = $post['ID'];
		$post_name = sanitize_title($post['post_name']);
		$terms = get_term_id_by_name(explode(', ', $post['terms']));;
		$taxonomy = $post['taxonomy'];

		$updated_posts = wp_set_post_terms($post_id, $terms, $taxonomy, $appended_in_existing_tags = false);

		// ** Check If Page does not exist, if true, create a new post 
		if (False !== get_post_status($post_id)) {

			// Update the post into the database
			$updated_post_id = wp_update_post(
				array(
					'ID' => $post_id,
					'post_name' => $post_name
				)
			);
			if (is_wp_error($updated_post_id)) {
				$errors = $updated_post_id->get_error_messages();
				foreach ($errors as $error) {
					echo $error;
				}
			}
		}
	}
}