<?php
function arab2rom($a) {
if (!is_numeric($a) OR $a<=0 OR $a > 3999)
return "Diese Zahl kann nicht konvertiert werden.";
$q = array(1000 => 'M',
500 => 'D',
100 => 'C',
50 => 'L',
10 => 'X',
5 => 'V',
1 => 'I',);
$x = array ('DCCCC' => 'CM',
'CCCC' => 'CD',
'LXXXX' => 'XC',
'XXXX' => 'XL',
'VIIII' => 'IX',
'IIII' => 'IV',);
$r = '';
foreach ($q as $n => $s) {
$b = floor($a / $n);
if ($b > 0) $r .= str_repeat($s, $b);
$r = strtr($r, $x);
$a = $a % $n;
}
return $r;
}
printf ('<form action="%s" method="POST">', $_SERVER['SCRIPT_NAME']);
print ('<table><tr>');
printf ('<td><input type="text" name="arab" value="%s"></td>', $_REQUEST['arab']);
printf ('<td>%s</td>', (isset($_REQUEST) AND !empty($_REQUEST)) ? arab2rom($_REQUEST['arab']) : ' ');
print ('</tr><tr>');
print ('<td> </td><td><input type="submit" name="cmd" value="OK"></td>');
print ('</tr></table>');
?>
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