Famous Internet Programmer

1.Write a program which can convert a temperature in Fahrenheit to the corresponding temperature in Celsius and vice versa?

Im a new user to PHP so need help to study the PHP . I cant really understand the programm.

Here’s a simple PHP form that will do the trick. And If you’re looking for a great site to learn PHP, go to: http://www.tizag.com/phpT/index.php

<form action="<?php $PHP_SELF ?>" method="post">

Fahrenheit Temp: <input type="text" size="3" name="tf"> <br><br>

Celsius Temp: <input type="text" size="3" name="tc"><br><br>

<input type="submit" value="CONVERT">
</form>
<br><br>

<?php

// Request the variables from the form.
$tf = $_REQUEST['tf'] ;
$tc = $_REQUEST['tc'] ;

//To convert a Fahrenheit temperature to Celsius, we use the following formula: (5/9) * (F -32)
//Since we need the 5/9 and the F – 32 value in parenthesis, we assign them to variables to make the procedure possible in PHP.

$x = 5 / 9;
$y = $tf – 32;
$temp_c = $x * $y;

// To convert a Celsius temperature to Fahrenheit we use the following: F = (9/5) * C + 32

$temp_f = 9 / 5 * $tc + 32;

// Now we print the results:

if ($tf) {
echo "Temperature in Celsius is: <b> $temp_c </b>";
}

if ($tc) {
echo "Temperature in Fahrenheit is: <b> $temp_f </b>";
}

?>

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