Using PHP, design a function that given a Roman numeral (Wikipedia link.), in input, is able...

Using PHP, design a function that given a Roman numeral (Wikipedia link.), in input, is able to compute the modern Hindu–Arabic numeral (wikipedia link), system representation (aka, 0123456789).

For example:

Input	Output
VI	6
IV	4
MCMXC	1990
IX	9

Be sure to add all the necessary checks and at least one testing function.
Try to split the logic in more small functions.

Expert Solution

romantonumber.php:

<!DOCTYPE html>
<html>
<head>
   <title>Roman to Hindu-Arabic Number</title>
   <style>
   table{
       width:50%;
       border-collapse:collapse;
       text-align:center;
   }
</style>
</head>
<body>
<center>
<form method="post" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>">
<input type="text" id="roman_input" name="roman_input" placeholder="Enter Roman Number">
<input type="submit" value="Convert"/>
</form>
<br/>
<?php

$roman_numbers = array('M' => 1000,'CM' => 900,'D' => 500,'CD' => 400,'C' => 100,'XC' => 90,'L' => 50,'XL' => 40,'X' => 10,'IX' => 9,'V' => 5,'IV' => 4,'I' => 1);
if(!isset($_POST['roman_input']))
return 0;
else{
$roman_input = strtoupper($_POST['roman_input']);
$output = 0;

foreach ($roman_numbers as $key => $value) {
while (strpos($roman_input, $key) === 0) {
$output += $value;
$roman_input = substr($roman_input, strlen($key));
}
}

//output
echo "<table border='1'>";
echo "<tr><th>Input</th><th>Output</th></tr>";
echo "<tr><td>".strtoupper($_POST['roman_input'])."</td><td>".$output."</td></tr>";
echo "</table>";
}
?>
</center>
</body>
</html>

Output Screenshots:

venereology answered 1 month ago

Using PHP, design a function that given a Roman numeral (Links to an external site.)Links to...

Using PHP, design a function that given a Roman numeral (Links to an external site.)Links to an external site. in input, is able to compute the modern Hindu–Arabic numeral (Links to an external site.)Links to an external site. system representation (aka, 0123456789). For example: Input Output VI 6 IV 4 MCMXC 1990 IX 9 Be sure to add all the necessary checks and at least one testing function. Try to split the logic in more small functions.

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