阿拉伯数字转中文大写

function numberToChinese($number)
{
    $number = intval($number);
    $bit = array("零", "一", "二", "三", "四", "五", "六", "七", "八", "九", "十");
    //各位数
    if ($number <= 10) {
        return $bit[$number];
    }
    //十位数
    if ($number < 100) {
        $array = str_split($number);
        if ($array[0] < 2) {
            return $bit[10] . $bit[$array[1]];
        } else {
            if ($array[1] == 0) {
                return $bit[$array[0]] . $bit[10];
            } else {
                return $bit[$array[0]] . $bit[10] . $bit[$array[1]];
            }
        }
    }
    //百位数
    if ($number < 1000) {
        $array = str_split($number);
        if ($array[1] == 0 && $array[2] == 0) {
            return $bit[$array[0]] . "百";
        } elseif ($array[1] == 0 && $array[2] != 0) {
            return $bit[$array[0]] . "百" . $bit[$array[1]] . $bit[$array[2]];
        } elseif ($array[1] != 0 && $array[2] == 0) {
            return $bit[$array[0]] . "百" . $bit[$array[1]] . $bit[10];
        } else {
            return $bit[$array[0]] . "百" . $bit[$array[1]] . $bit[10] . $bit[$array[2]];
        }
    }
    //千位数
    if ($number < 10000) {
        $array = str_split($number);
        if ($array[1] == 0 && $array[2] == 0 && $array[3] == 0) {
            return $bit[$array[0]] . "千";
        } elseif ($array[1] == 0 && $array[2] != 0 && $array[3] != 0) {
            return $bit[$array[0]] . "千" . $bit[$array[1]] . $bit[$array[2]] . $bit[10] . $bit[$array[3]];
        } elseif ($array[1] == 0 && $array[2] == 0 && $array[3] != 0) {
            return $bit[$array[0]] . "千" . $bit[$array[1]] . $bit[$array[3]];
        } elseif ($array[1] == 0 && $array[2] != 0 && $array[3] == 0) {
            return $bit[$array[0]] . "千" . $bit[$array[1]] . $bit[$array[2]] . $bit[10];
        } elseif ($array[1] != 0 && $array[2] == 0 && $array[3] == 0) {
            return $bit[$array[0]] . "千" . $bit[$array[1]] . "百";
        } elseif ($array[1] != 0 && $array[2] != 0 && $array[3] == 0) {
            return $bit[$array[0]] . "千" . $bit[$array[1]] . "百" . $bit[$array[2]] . $bit[10];
        } elseif ($array[1] != 0 && $array[2] == 0 && $array[3] != 0) {
            return $bit[$array[0]] . "千" . $bit[$array[1]] . "百" . $bit[$array[2]] . $bit[$array[3]];
        } else {
            return $bit[$array[0]] . "千" . $bit[$array[1]] . "百" . $bit[$array[2]] . $bit[10] . $bit[$array[3]];
        }
    }
    return $number;
}