How to convert lowercase numbers to uppercase in php

php How to convert lowercase numbers to uppercase: First create a PHP sample file; then use the "private function getChineseNumber($num, $mode = true){...}" method to convert lowercase numbers to uppercase That’s it.

The operating environment of this article: windows7 system, PHP7.1 version, DELL G3 computer

php realizes the conversion of Arabic numerals to Chinese uppercase

/**
     *  阿拉伯数字到中文大写转换
     *
     * @param $num
     * @param bool $mode
     * @return string
     */
    private function getChineseNumber($num, $mode = true)
    {
        $char = array("零", "壹", "贰", "叁", "肆", "伍", "陆", "柒", "捌", "玖");
        $dw = array("", "拾", "佰", "仟", "", "万", "亿", "兆");
        $dec = "点";
        $retval = "";
        if ($mode) {
            preg_match_all("/^0*(\d*)\.?(\d*)/", $num, $ar);
        } else {
            preg_match_all("/(\d*)\.?(\d*)/", $num, $ar);
        }
 
        if ($ar[2][0] != 00) {
            $retval = $dec . $this->getChineseNumber($ar[2][0], false); //如果有小数，则用递归处理小数
        }
 
        if ($ar[1][0] != 00) {
            $str = strrev($ar[1][0]);
            for ($i = 0; $i < strlen($str); $i++) {
                $out[$i] = $char[$str[$i]];
                if ($mode) {
                    $out[$i] .= $str[$i] != "0" ? $dw[$i % 4] : "";
 
                    if ($str[$i] + $str[($i - 1 >= 0) ? $i - 1 : 0] == 0) {
                        $out[$i] = "";
                    }
 
                    if ($i % 4 == 0) {
                        $out[$i] .= $dw[4 + floor($i / 4)];
                    }
                }
            }
 
            $retval = join("", array_reverse($out)) . $retval;
        }
 
        return $retval;
    }

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