php小写金额转大写

public static function amountInWords($num) {

if (!is_numeric($num) || empty($num))

return "";

$return = "";

$unit = array("分", "角", "圆", "整");

$dw = array("", "拾", "佰", "仟", "", "万", "亿", "兆");

$char = array("零", "壹", "贰", "叁", "肆", "伍", "陆", "柒", "捌", "玖");

preg_match_all("/(\d*)\.?(\d*)/", $num, $ar);

if (intval($ar[2][0]) > 0) {

$return .= $ar[2][0][0] == 0 ? "" : $char[$ar[2][0][0]] . $unit[1];

if (isset($ar[2][0][1])) {

if (empty($return) && $ar[1][0] > 0)

$return = $char[0] . $char[$ar[2][0][1]] . $unit[0];

else

$return .= $char[$ar[2][0][1]] . $unit[0];

}

}else{

$return .= $unit[3];

}

if ($ar[1][0] != "") {

$str = strrev($ar[1][0]);

$len = strlen($str);

for ($i = 0; $i < $len; $i++) {

$out[$i] = $char[$str[$i]];

$out[$i] .= $str[$i] != "0"? $dw[$i%4] : "";

if ($str[$i] + $str[$i-1] == 0)

$out[$i] = "";

if ($i%4 == 0)

$out[$i] .= $dw[4+floor($i/4)];

if ($out[$i] == "零万")

$out[$i] = "万零";

}

$left = join("", array_reverse($out));

if (!empty($left))

$return = $left . $unit[2] . $return;

}

return $return;

}