note 46987 deleted from language.operators.array by googleguy
| From: | googleguy@php.net | Date: | Fri, 11 Jan 2013 09:27:47 +0000 |
| Subject: | note 46987 deleted from language.operators.array by googleguy | ||
| References: | 1 | Groups: | php.notes |
| Request: | Send a blank email to php-notes+get-192911@lists.php.net to get a copy of this message | ||
Note Submitter: Peter
----
The code from texbungalow at web dot de below is slightly incorrect. If my memory from primary
school history is correct, roman numerals don't allow things like MIM - it has to be MCMXCIX,
ie each step is only 1 level down (sorry, I can't explain it very well.
a print_r($segments) comparing the snippets should explain.
Corrected code:
<?php
function roman ($nr ) {
$base_digits= array (
1=> "I",
10=> "X",
100=> "C",
1000=> "M",
);
$help_digits= array (
5=> "V",
50=> "L",
500=> "D",
);
$all_digits= $base_digits+ $help_digits;
foreach ($base_digits as $key1=> $value1 )
foreach ($all_digits as $key2=> $value2 )
if ($key1< $key2 && $key1 >= ($key2 / 10))
$segments[$key2- $key1 ]= $value1. $value2;
$segments+= $all_digits;
krsort ($segments );
foreach ($segments as $key=> $value )
while ($key<= $nr ) {
$nr-= $key;
$str.= $value;
}
return $str;
}
echo roman (1998); // prints MCMXCVIII
?>