/**
	 * Making namespace safe
	 *
	 * @param  string   $string    The namespace string you would like to make safe
	 *
	 * @return string on success
	 * @since  3.0.9
	 */
	public static function safe(string $string): string
	{
		// Remove leading and trailing backslashes
		$string = trim($string, '\\');

		// Split the string into namespace segments
		$segments = explode('\\', $string);

		// make each segment safe
		$segments = array_map([self::class, 'safeSegment'], $segments);

		// Join the namespace segments back together
		return implode('\\', $segments);
	}

	/**
	 * Making one namespace segment safe
	 *
	 * @param  string   $string    The namespace segment string you would like to make safe
	 *
	 * @return string on success
	 * @since  3.0.9
	 */
	public static function safeSegment(string $string): string
	{
		// Check if segment starts with a number
		if (preg_match("/^\d/", $string))
		{
			// Extract the starting number(s)
			preg_match("/^\d+/", $string, $matches);

			if (isset($matches[0]))
			{
				$numberWord = StringHelper::numbers($matches[0]);
				$string = str_replace($matches[0], $numberWord, $string);
			}
		}

		// Transliterate string TODO: look again as this makes it lowercase
		// $segment = StringHelper::transliterate($segment);

		// Make sure segment only contains valid characters
		return preg_replace("/[^A-Za-z0-9]/", '', $string);
	}