php 金额大小写如何转换

<?  
function upper($ns) { 
    static $cnums=array("零","壹","贰","叁","肆","伍","陆","柒","捌","玖"), 
        $cnyunits=array("圆","角","分"), 
        $grees=array("拾","佰","仟","万","拾","佰","仟","亿"); 
    list($ns1,$ns2)=explode(".",$ns,2); 
    $ns2=array_filter(array($ns2[1],$ns2[0])); 
    $ret=array_merge($ns2,array(implode("",calu(str_split($ns1),$grees)),"")); 
    $ret=implode("",array_reverse(calu($ret,$cnyunits))); 
    return str_replace(array_keys($cnums),$cnums,$ret); 
}

function calu($list,$units) { 
    $ul=count($units); 
    $xs=array(); 
    foreach (array_reverse($list) as $x) { 
        $l=count($xs); 
        if ($x!="0" || !($l%4)) $n=($x==&#39;0&#39;?&#39;&#39;:$x).($units[($l-1)%$ul]); 
        else $n=is_numeric($xs[0][0])?$x:&#39;&#39;; 
        array_unshift($xs,$n); 
    } 
    return $xs; 
}

 echo upper(&#39;12121&#39;);

?>

<?php
/**
* 转换大写金额
* $num 数字类型
*/
function inttod($num) {
    //判断$num是否存在
    if(!$num) return &#39;零圆&#39;;
    //保留小数点后两位
    $num = round($num, 2);
    //将浮点转换为整数
    $tem_num = $num * 100;
    //判断数字长度
    $tem_num_len = strlen($tem_num);
    if($tem_num_len > 14) {
        return &#39;数字太大了吧，有这么大的金钱吗&#39;;
    }
    //大写数字
    $dint = array(&#39;零&#39;, &#39;壹&#39;, &#39;贰&#39;, &#39;叁&#39;, &#39;肆&#39;, &#39;伍&#39;, &#39;陆&#39;, &#39;柒&#39;, &#39;捌&#39;, &#39;玖&#39;);
    //大写金额单位
    $danwei = array(&#39;仟&#39;, &#39;佰&#39;, &#39;拾&#39;, &#39;亿&#39;, &#39;仟&#39;, &#39;佰&#39;, &#39;拾&#39;, &#39;万&#39;, &#39;仟&#39;, &#39;佰&#39;, &#39;拾&#39;, &#39;圆&#39;);
    $danwei1 = array(&#39;角&#39;, &#39;分&#39;);
    //空的变量用来保存转换字符串
    $daxie = &#39;&#39;;
    //分割数字，区分圆角分
    list($left_num, $right_num) = explode(&#39;.&#39;, $num);
    //计算单位长度
    $danwei_len = count($danwei);
    //计算分割后的字符串长度
    $left_num_len = strlen($left_num);
    $right_num_len = strlen($right_num);
    //循环计算亿万元等
    for($i = 0; $i < $left_num_len; $i++) {
        //循环单个文字
        $key_ = substr($left_num, $i, 1);
        //判断数字不等于0或数字等于0与金额单位为亿、万、圆，就返回完整单位的字符串
        if($key_ !== &#39;0&#39; || ($key_ == &#39;0&#39; && ($danwei[$danwei_len - $left_num_len + $i] == &#39;亿&#39; || $danwei[$danwei_len - $left_num_len + $i] == &#39;万&#39; || $danwei[$danwei_len - $left_num_len + $i] == &#39;圆&#39;))) {
            $daxie = $daxie . $dint[$key_] . $danwei[$danwei_len - $left_num_len + $i];
        } else {
            //否则就不含单位
            $daxie = $daxie . $dint[$key_];
        }
    }
    //循环计算角分
    for($i = 0; $i < $right_num_len; $i++) {
        $key_ = substr($right_num, $i, 1);
        if($key_ > 0) {
            $daxie = $daxie . $dint[$key_] . $danwei1[$i];
        }
    }
    //计算转换后的长度
    $daxie_len = strlen($daxie);
    //设置文字切片从0开始，utf-8汉字占3个字符
    $j = 0;
    while($daxie_len > 0) {
        //每次切片两个汉字
        $str = substr($daxie, $j, 6);
        //判断切片后的文字不等于零万、零圆、零亿、零零
        if($str == &#39;零万&#39; || $str == &#39;零圆&#39; || $str == &#39;零亿&#39; || $str == &#39;零零&#39;) {
            //重新切片
            $left = substr($daxie, 0, $j);
            $right = substr($daxie, $j + 3);
            $daxie = $left . $right;
        }
        $j += 3;
        $daxie_len -= 3;
    }
    return &#39;人民币&#39; . $daxie . &#39;整&#39;;
}
$result = inttod(99090909090.19);
var_dump($result);