PHP将整数数字转换为罗马数字实例分享

<?php

header("content-type:text/html;charset=utf-8");

//将数字转换为罗马表示形式

function numberToRoman($num) 

{ 

 // Be sure to convert the given parameter into an integer

 $n = intval($num);

 $result = ''; 

 

 // Declare a lookup array that we will use to traverse the number: 

 $lookup = array(

  'M' => 1000, 'CM' => 900, 'D' => 500, 'CD' => 400, 

  'C' => 100, 'XC' => 90, 'L' => 50, 'XL' => 40, 

  'X' => 10, 'IX' => 9, 'V' => 5, 'IV' => 4, 'I' => 1

 ); 

 

 foreach ($lookup as $roman => $value) 

 {

  // Look for number of matches

  $matches = intval($n / $value); 

 

  // Concatenate characters

  $result .= str_repeat($roman, $matches); 

 

  // Substract that from the number 

  $n = $n % $value; 

 } 

 return $result; 

} 

echo '整数数字转换为罗马数字：<br><br>';

// VIII

echo '数字8：'.numberToRoman(8).'<br>';

// CXXIII

echo '数字123：'.numberToRoman(123).'<br>';

// MMCCCLV

echo '数字2355：'.numberToRoman(2355).'<br>';

// MMMMCMXCIX

echo '数字4999：'.numberToRoman(4999).'<br>';

?>

输出：

<?php

use Romans\Filter\IntToRoman;

 

$filter = new IntToRoman();

$result = $filter->filter(1999);

echo $result;

?>

<?php

use Romans\Filter\RomanToInt;

 

$filter = new RomanToInt();

$result = $filter->filter('MCMXCIX');

echo $result;

?>