人民币大写转化

    public function test_cny(){
        echo $this->cny(44.55);
    }

    /***
     *人民币大写转化；~~~未测试;~~~~
     */
    public 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("",$this->_cny_map_unit(str_split($ns1),$grees)),""));
        $ret = implode("",array_reverse($this->_cny_map_unit($ret,$cnyunits)));
        return str_replace(array_keys($cnums),$cnums,$ret);
    }


    public 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;
    }