利用php怎么将阿拉伯数字与罗马数字进行转换?很多新手对此不是很清楚,为了帮助大家解决这个难题,下面小编将为大家详细讲解,有这方面需求的人可以来学习下,希望你能有所收获。

具体如下:
3999 || $f <= 0) return false;
// Define the roman figures:
$roman = array(
'M' => 1000,
'D' => 500,
'C' => 100,
'L' => 50,
'X' => 10,
'V' => 5,
'I' => 1
);
// Calculate the needed roman figures:
foreach($roman as $k => $v)
if(($amount[$k] = floor($f / $v)) > 0)
$f -= $amount[$k] * $v;
// Build the string:
$return = '';
foreach($amount as $k => $v)
{
$return .= $v <= 3 ? str_repeat($k, $v) : $k . $old_k;
$old_k = $k;
}
// Replace some spacial cases and return the string:
return str_replace(array('VIV','LXL','DCD'),array('IX','XC','CM'),$return);
}
// echo dec2romen(1981);
// Function to get the decimal value of a roman string:
function roman2dec($str = '')
{
// Return false if not at least one letter is in the string:
if(is_numeric($str)) return false;
// Define the roman figures:
$roman = array(
'M' => 1000,
'D' => 500,
'C' => 100,
'L' => 50,
'X' => 10,
'V' => 5,
'I' => 1
);
// Convert the string to an array of roman values:
for($i = 0; $i < strlen($str); $i++)
if(isset($roman[strtoupper($str[$i])]))
$values[] = $roman[strtoupper($str[$i])];
// Calculate the sum of that array:
$sum = 0;
while($current = current($values))
{
$next = next($values);
$next > $current ? $sum += $next - $current + 0 * next($values) : $sum += $current;
}
// Return the value:
return $sum;
}
// echo roman2dec(IX);
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