Put the code below into a file called convert.php
<head>
<title>Convert Temperature</title>
</head>
<body>
<h2>Temperature Conversion</h2>
<form action = "<?php echo $_SERVER[’PHP_SELF’]; ?>"
method = "GET">
Degrees:
<input type = "text" name = "degree" size=4>
<select name="scale"> <option value="celcius">Celsius</option> <option value="fahrenheit">Fahrenheit</option> <option value="kelvin">Kelvin</option> <option value="rankine">Rankine</option> </select>
<br/>
<input type = "submit" name = "Convert Temperature"/>
</form>
