'ศูนย์', 1 => 'หนึ่ง', 2 => 'สอง', 3 => 'สาม', 4 => 'สี่', 5 => 'ห้า', 6 => 'หก', 7 => 'เจ็ด', 8 => 'แปด', 9 => 'เก้า', ]; private const THAI_UNITS = [ 1 => 'สิบ', 2 => 'ร้อย', 3 => 'พัน', 4 => 'หมื่น', 5 => 'แสน', 6 => 'ล้าน', ]; private const THAI_COMPOUND_ONE = 'เอ็ด'; private const THAI_COMPOUND_TWO = 'ยี่'; private const THAI_INTEGER = 'ถ้วน'; private const THAI_MINUS = 'ลบ'; private const THAI_BAHT = 'บาท'; private const THAI_SATANG = 'สตางค์'; /** * BAHTTEXT. * * @param mixed $number The number or array of numbers to convert * * @return array|string If an array of values is passed as the argument, then the returned result will also be an array with the same dimensions */ public static function getBahtText(mixed $number): array|string { if (is_array($number)) { return self::evaluateSingleArgumentArray([self::class, __FUNCTION__], $number); } if (is_string($number) && preg_match('/^-?\d+$/', $number)) { $isNegative = str_starts_with($number, '-'); $baht = ltrim($number, '-0') ?: '0'; $satang = '00'; } elseif (is_bool($number) || is_numeric($number)) { $number += 0; $isNegative = $number < 0; [$baht, $satang] = explode('.', number_format(abs($number), 2, '.', '')); } else { return ExcelError::VALUE(); } $hasWhole = $baht !== '0'; $hasFraction = $satang !== '00'; if (!$hasWhole && !$hasFraction) { return self::THAI_DIGITS[0] . self::THAI_BAHT . self::THAI_INTEGER; } $text = $isNegative ? self::THAI_MINUS : ''; if ($hasWhole) { $text .= self::convertLarge($baht) . self::THAI_BAHT; } $text .= $hasFraction ? self::convertBlock($satang) . self::THAI_SATANG : self::THAI_INTEGER; return $text; } private static function convertLarge(string $digits): string { $length = strlen($digits) % 6 ?: 6; $chunks = [ substr($digits, 0, $length), ...str_split(substr($digits, $length), 6), ]; $chunks = array_filter($chunks, fn (string $chunk): bool => $chunk !== ''); return implode( self::THAI_UNITS[6], array_map(self::convertBlock(...), $chunks) ); } private static function convertBlock(string $block): string { $out = ''; $length = strlen($block); $i = 0; // Hundreds and higher powers for ($power = $length - 1; $power >= 2; --$power) { $digit = $block[$i++]; if ($digit !== '0') { $out .= self::THAI_DIGITS[$digit] . self::THAI_UNITS[$power]; } } // Tens $ten = $length > 1 ? $block[$i++] : '0'; if ($ten !== '0') { $out .= match ($ten) { '1' => '', '2' => self::THAI_COMPOUND_TWO, default => self::THAI_DIGITS[$ten], } . self::THAI_UNITS[1]; } // Ones $one = $block[$i] ?? '0'; if ($one !== '0') { $out .= $ten !== '0' && $one === '1' ? self::THAI_COMPOUND_ONE : self::THAI_DIGITS[$one]; } return $out; } }