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<?php
//include Numbers_Roman class
include "Numbers/Roman.php";

//create object
$nr = new Numbers_Roman();

//result: "5 in Roman is V."
echo "5 in Roman is " . $nr->toNumeral(5) . ".\n";

//result: "318 in Roman is CCCXVIII".
echo "318 in Roman is " . $nr->toNumeral(318) . ".";
?>

The PEAR Number_Roman class translates regular numbers into their Roman equivalents. The class' toNumeral( ) method accepts an integer and outputs the corresponding Roman numeral. You can print a series of Roman numerals by combining the toNumeral( ) method with a loop, as shown here:

<?php
//include Numbers_Roman class
include "Numbers/Roman.php";

//create object
$nr = new Numbers_Roman();

//print numbers 1 to 100 as Roman numerals
//result: "I II III IV...XCVIII XCIX C"
foreach (range(1, 100) as $x) {
  print $nr->toNumeral($x) . " ";
}
?>

You can also reverse the process with the toNumber( ) method as in the following code snippet:

<?php
//include Numbers_Roman class
include "Numbers/Roman.php";

//create object
$nr = new Numbers_Roman();

//print CVII as an Arabic number
//result: "CVII = 107"
echo "CVII = " . $nr->toNumber('CVII');
?>

Note that toNumeral( ) does not support decimal or negative values.