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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Tabla Fahreheit & Celsius</title>
</head>
<body bgcolor="silver">
<?php
$fahrenheit = -50;
echo "<table align='center' border=3 cellpadding=5>"; //Comienzo una tabla, y no la cierro hasta terminar de insertar datos, para //que tambien entren.
echo "<tr><td><b><font face='calibri'>Fahrenheit Degrees</font></b></td><td><b><font face='calibri'>Celsius Degrees</font></b></td></tr>";
while($fahrenheit <=50)
{
$celsius = ((($fahrenheit - 32)*5)/9);
$celsius_format = number_format($celsius,2);
echo "<tr><td><font face='calibri' color='white'>".$fahrenheit."</font></td><td><font face='calibri' color='#0000FF'>".$celsius_format."</font></td></tr>"; //Repite esta sentencia hasta que $fahrenheit alcance 50
$fahrenheit +=5;//$fahrenheit = $fahrenheit + 5;
}
echo "</table>"
?>
</body>
</html>