PHP算法--将数字金额转换成大写金额

<?php
//$num = 12345.67; 
function RMB_Upper($num)
{
    $num = round($num,2);  //取两位小数
    $num = ‘‘.$num;  //转换成数字
    $arr = explode(‘.‘,$num);  

    $str_left = $arr[0]; // 12345
    $str_right = $arr[1]; // 67

    $len_left = strlen($str_left); //小数点左边的长度
    $len_right = strlen($str_right); //小数点右边的长度

    //循环将字符串转换成数组，
    for($i=0;$i<$len_left;$i++)
    {
        $arr_left[] = substr($str_left,$i,1);
    }
    //print_r($arr_left);
    //output:Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5 )

    for($i=0;$i<$len_right;$i++)
    {
        $arr_right[] = substr($str_right,$i,1);
    }
    //print_r($arr_right);
    //output：Array ( [0] => 6 [1] => 7 )
    
    //构造数组$daxie
    $daxie = array(
        ‘0‘=>‘零‘,
        ‘1‘=>‘壹‘,
        ‘2‘=>‘贰‘,
        ‘3‘=>‘叁‘,
        ‘4‘=>‘肆‘,
        ‘5‘=>‘伍‘,
        ‘6‘=>‘陆‘,
        ‘7‘=>‘柒‘,
        ‘8‘=>‘捌‘,
        ‘9‘=>‘玖‘,
    );

    //循环将数组$arr_left中的值替换成大写
    foreach($arr_left as $k => $v)
    {
        $arr_left[$k] = $daxie[$v];
        switch($len_left--)
        {
            //数值后面追加金额单位
            case 5:
                $arr_left[$k] .= ‘万‘;break;
            case 4:
                $arr_left[$k] .= ‘千‘;break;
            case 3:
                $arr_left[$k] .= ‘百‘;break;
            case 2:
                $arr_left[$k] .= ‘十‘;break;
            default:
                $arr_left[$k] .= ‘元‘;break;
        }
    }
    //print_r($arr_left);
    //output :Array ( [0] => 壹万 [1] => 贰千 [2] => 叁百 [3] => 肆十 [4] => 伍元 )

    foreach($arr_right as $k =>$v)
    {
        $arr_right[$k] = $daxie[$v];
        switch($len_right--)
        {
            case 2:
                $arr_right[$k] .= ‘角‘;break;
            default:
                $arr_right[$k] .= ‘分‘;break;
        }
    }
    //print_r($arr_right);
    //output :Array ( [0] => 陆角 [1] => 柒分 )

    //将数组转换成字符串，并拼接在一起
    $new_left_str = implode(‘‘,$arr_left);
    $new_right_str = implode(‘‘,$arr_right);

    $new_str = $new_left_str.$new_right_str;

    //echo $new_str;
    //output :‘壹万贰千叁百肆十伍元陆角柒分‘

    //如果金额中带有0，大写的字符串中将会带有‘零千零百零十‘,这样的字符串，需要替换掉
    $new_str = str_replace(‘零万‘,‘零‘,$new_str);
    $new_str = str_replace(‘零千‘,‘零‘,$new_str);
    $new_str = str_replace(‘零百‘,‘零‘,$new_str);
    $new_str = str_replace(‘零十‘,‘零‘,$new_str);
    $new_str = str_replace(‘零零零‘,‘零‘,$new_str);
    $new_str = str_replace(‘零零‘,‘零‘,$new_str);
    $new_str = str_replace(‘零元‘,‘元‘,$new_str);


    //echo‘<br/>‘;
    return $new_str;
}


echo RMB_Upper(12345.67);