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=='0'?'':$x).($units[($l-1)%$ul]); 
 else $n=is_numeric($xs[0][0])?$x:''; 
 array_unshift($xs,$n); 
 } 
 return $xs; 
}

 echo upper('12121');

?>

<?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 '零圆';
 //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 '数字太大了吧，有这么大的金钱吗';
 }
 //大写数字
 $dint = array('零', '壹', '贰', '叁', '肆', '伍', '陆', '柒', '捌', '玖');
 //大写金额单位
 $danwei = array('仟', '佰', '拾', '亿', '仟', '佰', '拾', '万', '仟', '佰', '拾', '圆');
 $danwei1 = array('角', '分');
 //空的变量用来保存转换字符串
 $daxie = '';
 //分割数字，区分圆角分
 list($left_num, $right_num) = explode('.', $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_ !== '0' || ($key_ == '0' && ($danwei[$danwei_len - $left_num_len + $i] == '亿' || $danwei[$danwei_len - $left_num_len + $i] == '万' || $danwei[$danwei_len - $left_num_len + $i] == '圆'))) {
 $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 == '零万' || $str == '零圆' || $str == '零亿' || $str == '零零') {
 //重新切片
 $left = substr($daxie, 0, $j);
 $right = substr($daxie, $j + 3);
 $daxie = $left . $right;
 }
 $j += 3;
 $daxie_len -= 3;
 }
 return '人民币' . $daxie . '整';
}
$result = inttod(99090909090.19);
var_dump($result);