php阿拉伯数字转化为大写

//人民币金额转大写程序PHP版
//作者：大V【vsxp】
$number = $_GET['num'] ? trim($_GET['num']) : 8421;
echo Num2Cny::ParseNumber($number);
class Num2Cny{
    static $basical = array(0=>"零","壹","贰","叁","肆","伍","陆","柒","捌","玖");
    static $advanced=array(1=>"拾","佰","仟");
    public static function ParseNumber($number){
        $number=trim($number);
        if ($number>999999999999) return "数字太大，无法处理。抱歉！";
        if ($number==0) return "零";
        if(strpos($number,'.')){
            $number=round($number,2);
            $data=explode(".",$number);
            $data[0]=self::int($data[0]);
            $data[1]=self::dec($data[1]);
            return $data[0].$data[1];
        }else{
            return self::int($number).'整';
        }
    }

    public static function int($number){
        $arr=array_reverse(str_split($number));
        $data='';
        $zero=false;
        $zero_num=0;
        foreach ($arr as $k=>$v){
            $_chinese='';
            $zero=($v==0)?true:false;
            $x=$k%4;
            if($x && $zero && $zero_num>1)continue;
            switch ($x){
                case 0:
                if($zero){
                    $zero_num=0;
                }else{
                    $_chinese=self::$basical[$v];
                    $zero_num=1;
                }
                if($k==8){
                    $_chinese.='亿';
                }elseif($k==4){
                    $_chinese.='万';
                }
                break;
                default:
                if($zero){
                    if($zero_num==1){
                        $_chinese=self::$basical[$v];
                        $zero_num++;
                    }
                }else{
                    $_chinese=self::$basical[$v];
                    $_chinese.=self::$advanced[$x];
                }
            }
            $data=$_chinese.$data;
        }
        return $data.'元';
    }

    public static function dec($number){
        if(strlen($number)<2) $number.='0';
        $arr=array_reverse(str_split($number));
        $data='';
        $zero_num=false;
        foreach ($arr as $k=>$v){
            $zero=($v==0)?true:false;
            $_chinese='';
            if($k==0){
                if(!$zero){
                    $_chinese=self::$basical[$v];
                    $_chinese.='分';
                    $zero_num=true;
                }
            }else{
                if($zero){
                    if($zero_num){
                        $_chinese=self::$basical[$v];
                    }
                }else{
                    $_chinese=self::$basical[$v];
                    $_chinese.='角';
                }
            }
            $data=$_chinese.$data;
        }
        return $data;
    }

}