任意阿拉伯数字转人民币大写

　　今天在群里谈论着玩的时候，问群里人呢，让他们提供一些php的算法，然后“Visvoy”给出了这样一个题目“任意阿拉伯数字转人民币大写”，于是个人试着写了写，不过里面有些bug，等日后自己在完善下。

function capital($data){
    
    $array = explode(".", $data);
    $array[0] = (string)strrev($array[0]);
    //判断是否存在小数点
    if(!empty($array[1])){
        $array[1] = (string)strrev($array[1]);
        $type = "1";
        return capital_data($array[0]).capital_data($array[1],$type);
    }else{
        
        return capital_data($array[0]);
    }
}

function capital_data($data,$type = 0){
    
    $capital = array("零","壹","贰","弎","肆","伍","陆","柒","捌","玖");

    if($type == 0){
        $RMB = array("元","十","百","千","万","十","百","千","亿","十","百","千","万");
    }else{
        $RMB = array("厘","毫","分","角");
    }
    //将整型转为字符型
    $data = (string)$data;

    //判断位数
    $num = strlen($data);
    
    if($num>13){
        return $data;
    }
    $record = array();
    for($i=0 ; $i < $num ; $i++){
        $record[] = $capital[$data[$i]].$RMB[$i];
    }
    //反转数组
    $record = array_reverse($record);
    
    $string = "";
    foreach($record as $value){
        $string .= $value;
    }
    
    return $string;
}


$data = 1123123.678;
echo $data."<br>";
print_r(capital($data));

以下为群内“苏demo”的个人实现代码，也一并附上：

function cny($ns) {   
    echo $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_split($ns1),$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;   
}  
$Ren = cny(100.00);
var_dump($Ren);

以下为“奋斗的馒头”的解决思路：

 1、求位数 

2、把数字分拆放倒数组中 

3、预定位数后边的单位文字 
 
4、循环放出数组并插入预定单位文字 

5、输出