Check::convertCharsToHex

protected function convertCharsToHex($string) : string
{
	$result = '';

	for ($i = 0, $len = mb_strlen($string); $i < $len; $i++)
	{
		$hex = dechex(ord($string[$i]));
		if (mb_strlen($hex) === 1)
		{
			$hex = '0'.$hex;
		}

		$result .= ToUpper($hex);
	}

	return $result;
}