分享一个用php写的人民币数字转人民币大写的函数

<?     
function cny($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("",_cny_map_unit(str_spl
it($ns
1),$grees)),""));    
    $ret=implode("",array_reverse(_cny_map_unit($ret,$cnyunits)));
    return str_replace(array_keys($cnums),$cnums,$ret);
}
function _cny_map_unit($list,$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;    
}   
?>

<?php   
 echo cny('12121');   
?>