數字金額轉換成中文大寫金額的PHP函數

/
    數字金額轉換成中文大寫金額的函數
    String Int  $num  要轉換的小寫數字或小寫字符串
    return 大寫字母
    小數位為兩位
    /
    function get_amount($num){
        $c1 = "零壹貳叁肆伍陸柒捌玖";
        $c2 = "分角元拾佰仟萬拾佰仟億";
        $num = round($num, 2);
        $num = $num  100;
        if (strlen($num) > 10) {
            return "數據太長，沒有這么大的錢吧，檢查下";
        } 
        $i = 0;
        $c = "";
        while (1) {
            if ($i == 0) {
                $n = substr($num, strlen($num)-1, 1);
            } else {
                $n = $num % 10;
            } 
            $p1 = substr($c1, 3  $n, 3);
            $p2 = substr($c2, 3 * $i, 3);
            if ($n != '0' || ($n == '0' && ($p2 == '億' || $p2 == '萬' || $p2 == '元'))) {
                $c = $p1 . $p2 . $c;
            } else {
                $c = $p1 . $c;
            } 
            $i = $i + 1;
            $num = $num / 10;
            $num = (int)$num;
            if ($num == 0) {
                break;
            } 
        }
        $j = 0;
        $slen = strlen($c);
        while ($j < $slen) {
            $m = substr($c, $j, 6);
            if ($m == '零元' || $m == '零萬' || $m == '零億' || $m == '零零') {
                $left = substr($c, 0, $j);
                $right = substr($c, $j + 3);
                $c = $left . $right;
                $j = $j-3;
                $slen = $slen-3;
            } 
            $j = $j + 3;
        }


    if (substr($c, strlen($c)-3, 3) == '零') {
        $c = substr($c, 0, strlen($c)-3);
    }
    if (empty($c)) {
        return "零元整";
    }else{
        return $c . "整";
    }
}</pre>