php 大写金额

<?php
function numToChinese($num) {
    $c1 = "零壹贰叁肆伍陆柒捌玖";
    $c2 = "分角元拾佰仟万拾佰仟亿";
    $num = round($num, 2);
    $num = $num * 100;
    if (strlen($num) > 10) {
        return "数据太长，没有这么大的钱吧，检查下";
    }
    $i = 0;
    $c = "";
    while (1) {
        if ($i == 0 && $num % 10 == 0) {
            $i++;
            break;
        }
        $n = substr($num, -($i + 1), 1);
        $p1 = substr($num, -$i, 1);
        if ($n != '0' || ($n == '0' && ($p1 != '0' || $i == 8 || $i == 4))) {
            $left = substr($num, 0, -$i);
            if ($left != 0 || $p1 != '0' || $i == 8 || $i == 4) {
                $c = $c . $c1[$n] . $c2[$i];
            } else {
                $c = $c . $c1[$n];
            }
        } else {
            if ($i == 8 || $i == 4) {
                $c = $c . $c2[$i];
            }
        }
        $i = $i + 1;
    }
    $j = 0;
    $slen = strlen($c) - 1;
    while ($j <= $slen) {
        $m = substr($c, $j, 6);
        if ($m == "零元" || $m == "零万" || $m == "零亿" || $m == "零零") {
            $left = substr($c, 0, $j);
            $right = substr($c, $j + 3);
            $c = $left . $right;
            $j = $j - 3;
            $slen = $slen - 3;
        }
        $j++;
    }
    if (substr($c, -3) == "零") {
        $c = substr($c, 0, -3);
    }
    if (empty($c)) {
        return "零元整";
    }
    if (substr($c, -1) != "分") {
        $c = $c . "整";
    }
    return $c;
}

echo numToChinese(123456789.12); // 壹亿贰仟叁佰肆拾伍万陆仟柒佰捌拾玖元壹角贰分
?>