Delete all comments in WordPress with PHP

/**
 * Permanently deletes all standard (`comment` type) comments.
 *
 * @see https://wpcodebook.com/snippets/delete-all-comments-in-wordpress-with-php/
 * @see https://developer.wordpress.org/reference/functions/get_comments/
 * @see https://developer.wordpress.org/reference/functions/wp_delete_comment/
 */
$comments = get_comments( array( 'fields' => 'ids', 'type' => 'comment' ) );
foreach ( $comments as $comment_id ) {
	wp_delete_comment( $comment_id, true );
}