用PHP实现小写金额转换大写金额【精确到分】

/**
	*数字金额转换成中文大写金额的函数
	*String Int  $num  要转换的小写数字或小写字符串
	*return 大写字母
	*小数位为两位
	**/
	function get_amount($num){
		$c1 = "零壹贰叁肆伍陆柒捌玖";
		$c2 = "分角元拾佰仟万拾佰仟亿";
		$num = round($num, 2);
		$num = $num * 100;
		if (strlen($num) > 10) {
			return "数据太长，没有这么大的钱吧，检查下";
		} 
		$i = 0;
		$c = "";
		while (1) {
			if ($i == 0) {
				$n = substr($num, strlen($num)-1, 1);
			} else {
				$n = $num % 10;
			} 
			$p1 = substr($c1, 3 * $n, 3);
			$p2 = substr($c2, 3 * $i, 3);
			if ($n != '0' || ($n == '0' && ($p2 == '亿' || $p2 == '万' || $p2 == '元'))) {
				$c = $p1 . $p2 . $c;
			} else {
				$c = $p1 . $c;
			} 
			$i = $i + 1;
			$num = $num / 10;
			$num = (int)$num;
			if ($num == 0) {
				break;
			} 
		}
		$j = 0;
		$slen = strlen($c);
		while ($j < $slen) {
			$m = substr($c, $j, 6);
			if ($m == '零元' || $m == '零万' || $m == '零亿' || $m == '零零') {
				$left = substr($c, 0, $j);
				$right = substr($c, $j + 3);
				$c = $left . $right;
				$j = $j-3;
				$slen = $slen-3;
			} 
			$j = $j + 3;
		} 

		if (substr($c, strlen($c)-3, 3) == '零') {
			$c = substr($c, 0, strlen($c)-3);
		}
		if (empty($c)) {
			return "零元整";
		}else{
			return $c . "整";
		}
	}
 

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