Retrieves the comment ID of the current comment.

function get_comment_ID() { // phpcs:ignore WordPress.NamingConventions.ValidFunctionName.FunctionNameInvalid
	$comment    = get_comment();
	$comment_ID = ! empty( $comment->comment_ID ) ? $comment->comment_ID : '0';

	/**
	 * Filters the returned comment ID.
	 *
	 * @since 1.5.0
	 * @since 4.1.0 The `$comment` parameter was added.
	 *
	 * @param string     $comment_ID The current comment ID as a numeric string.
	 * @param WP_Comment $comment    The comment object.
	 */
	return apply_filters( 'get_comment_ID', $comment_ID, $comment );  // phpcs:ignore WordPress.NamingConventions.ValidHookName.NotLowercase
}