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Royalone94/temp.php

Forked from ugraphix/temp.php
Created May 29, 2019 08:47
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Temperature conversions (Fahrenheit, Celsius, Kelvin) using PHP
Raw
temp.php
<?php
//temp.php
//Celsius to Fahrenheit ° F = 9/5 ( ° C) + 32
//Fahrenheit to Celsius ° C = 5/9 (° F - 32)
//Celsius to Kelvin K = ° C + 273.15
//Kelvin to Celsius ° C = K - 273.15
//Fahrenheit to Kelvin K = 5/9 (° F - 32) + 273.15
//Kelvin to Fahrenheit ° F = 9/5 (K - 273.15) + 32
//Fahrenheit to celsius
function fahrenheit_to_celsius($given_value)
{
$celsius=5/9*($given_value-32);
return $celsius ;
}
//Fahrenheit to kelvin
function fahrenheit_to_kelvin($given_value)
{
$kelvin=fahrenheit_to_celsius($given_value) + 273.15;
return $kelvin ;
}
//Celsius to fahrenheit
function celsius_to_fahrenheit($given_value)
{
$fahrenheit=$given_value*9/5+32;
return $fahrenheit ;
}
//Celsius to kelvin
function celsius_to_kelvin($given_value)
{
$kelvin=$given_value+273.15;
return $kelvin ;
}
//Kelvin to fahrenheit equation
function kelvin_to_fahrenheit($given_value)
{
$fahrenheit=9/5*($given_value-273.15)+32;
return $fahrenheit ;
}
//Kelvin to celsius equation
function kelvin_to_celsius($given_value)
{
$celsius=$given_value-273.15;
return $celsius ;
}
?>
<html>
<head>
<title>Temp. Conv.</title>
</head>
<body>
<form action="" method="post">
<table>
<tr>
<td>
<select name="first_temp_type_name">
<option value="fahrenheit">Fahrenheit</option>
<option value="celsius">Celsius</option>
<option value="kelvin"> Kelvin</option>
</select>
</td>
</tr>
<tr>
<td>
<input type="text" name="given_value">
</td>
</tr>
<tr>
<td>
<select name="second_temp_type_name">
<option value="fahrenheit">Fahrenheit</option>
<option value="celsius">Celsius</option>
<option value="kelvin">Kelvin</option>
</select>
</td>
</tr>
<tr>
<td>
<input type="submit" name="btn" value="Convert">
</td>
</tr>
<tr>
<td>
<?php
if(isset($_POST['btn']))
{
$first_temp_type_name=$_POST['first_temp_type_name'];
$second_temp_type_name=$_POST['second_temp_type_name'];
$given_value=$_POST['given_value'];
//Fahrenheit to celsius and kelvin
if ($first_temp_type_name=='fahrenheit')
{
if ($second_temp_type_name=='celsius')
{
$celsius=fahrenheit_to_celsius($given_value);
echo "$given_value Fahrenheit = $celsius Celsius";
} elseif ($second_temp_type_name=='kelvin')
{
$kelvin=fahrenheit_to_kelvin($given_value);
echo "$given_value Fahrenheit = $kelvin Kelvin";
} else
{
echo "$given_value Fahrenheit";
}
}
//Celsius to fahrenheit and kelvin
if ($first_temp_type_name=='celsius')
{
if ($second_temp_type_name=='fahrenheit')
{
$fahrenheit=celsius_to_fahrenheit($given_value);
echo "$given_value Celsius = $fahrenheit Fahrenheit";
} elseif ($second_temp_type_name=='kelvin')
{
$kelvin=celsius_to_kelvin($given_value);
echo "$given_value Celsius = $kelvin Kelvin";
} else
{
echo "$given_value Celsius";
}
}
//Kelvin to fahrenheit and celsius
if ($first_temp_type_name=='kelvin')
{
if ($second_temp_type_name=='fahrenheit')
{
$fahrenheit=kelvin_to_fahrenheit($given_value);
echo "$given_value Kelvin = $fahrenheit Fahrenheit";
} elseif ($second_temp_type_name=='celsius')
{
$celsius=kelvin_to_celsius($given_value);
echo "$given_value Kelvin = $celsius Celsius";
} else
{
echo "$given_value Kelvin";
}
}
}
?>
</td>
</tr>
</table>
</form>
</body>
</html>
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