用PHP实现小写金额转换大写金额的代码(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"; 
} 
}