<?php

namespace app\common\lib\pinyin;

/**
 * 中文转拼音类.
 */
class PinyinNumber
{
    protected static $pinyin = [0 => 'ling', 1 => 'yi', 2 => 'er', 3 => 'san', 4 => 'si', 5 => 'wu', 6 => 'liu', 7 => 'qi', 8 => 'ba', 9 => 'jiu'];

    protected static $unit = ['', 'shi', 'bai', 'qian', 'wan', 'shiwan', 'baiwan', 'qianwan', 'yi'];

    /**
     * 获取数字的拼音
     * @param $number
     * @param $strtoupper // 返回大写
     * @return string
     */
    public static function getPinyin($number,$strtoupper = false)
    {
        $number = strval($number); // 将数字转换为字符串
        $length = strlen($number);
        $pinyinStr = '';

        for ($i = 0; $i < $length; $i++) {
            $digit = intval($number[$i]);

            if ($digit != 0) {
                // 处理万以上的位数
                if ($length - $i > 4) {
                    $pinyinStr .= self::$pinyin[$digit] . self::$unit[$length - $i - 1];
                    // 处理万位之间的零
                    if ($digit == 0 && $number[$i + 1] != 0) {
                        $pinyinStr .= 'ling';
                    }
                } else {
                    $pinyinStr .= self::$pinyin[$digit] . self::$unit[$length - $i - 1];
                }
            } else {
                // 处理连续的0
                if ($i == 0 || $number[$i] != 0) {
                    $pinyinStr .= self::$pinyin[$digit];
                }
            }
        }
        if ($strtoupper) $pinyinStr = strtoupper($pinyinStr);
        return $pinyinStr;
    }
}