How to use Recursive Approach In PHP

A recursive approach is also possible for converting an integer to Roman numerals.

PHP

<?php 
  
function intToRoman($num) { 
    if ($num <= 0) { 
        return ''; 
    } 
  
    $mapping = [ 
        1000 => 'M', 
        900 => 'CM', 
        500 => 'D', 
        400 => 'CD', 
        100 => 'C', 
        90 => 'XC', 
        50 => 'L', 
        40 => 'XL', 
        10 => 'X', 
        9 => 'IX', 
        5 => 'V', 
        4 => 'IV', 
        1 => 'I'
    ]; 
  
    foreach ($mapping as $value => $roman) { 
        if ($num >= $value) { 
            return $roman . intToRoman($num - $value); 
        } 
    } 
  
    return ''; 
} 
  
  
// Driver code 
$num = 1111; 
  
echo "Roman numeral for $num is: " 
    . intToRoman($num); 
      
?>

Output

Roman numeral for 1111 is: MCXI

PHP Program to Convert Integer to Roman Number

Converting an integer to a Roman number is a common problem often encountered in applications dealing with dates, historical data, and numeral representations. In this article, we will explore various approaches to converting an integer to Roman numerals in PHP.

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