conversion

zobi316

im trying to creat a script in php that will allow me to convert between imperial and Metric. i have been asked to use the following values for the purposes of conversion:

1 mile = 1.609 kilometres
1 inch = 2.54 centimetres
1 pound = 0.454 kilograms
1 horsepower = 0.746 kilowatts
1 pint = 0.568

I have dones the conversion from imperial to metric e.g 1 mile is 1.609 kilometres, but stuck on how i will convert from kilometres to miles. so that when u click submit, it should display 1.609 kilometres = 1 mile. I think i've done the coding correct for this is well but not sure:

Code: [Select]<?php
$number1 =$POST[number1];
$converter =$POST[converter];

if($converter == "Kilometres"){
$answer = $number1 / 1.609;
$unit = "Mile";
}

if($converter =="centimetres"){
$answer = $number1 / 2.54;
$unit = "inch";
}

if($converter == "kilograms"){
$answer = $number1 / 0.454;
$unit = "pound";
}

if($converter == "kilowatts"){
$answer = $number1 / 0.746;
&unit = "horsepower";
}

if($converter == "litres"){
$answer = $number1 / 0.568;
&unit = "pint";
}
?>
How do i get it working, will it need to go in another page. If so how, its not working. Here is the code:

Code: [Select]<html>
<head>
<title>Converter</title>
</head>
</body>
<form name="form1" method="post" action="conversion1.php">
<input name="number1" type="text" id="number1">
<select name="converter" id="converter">
<option value="Miles" selected>Miles</option>
<option value="Inch">Inch</option>
<option value="Pound">Pound</option>
<option value="Horsepower">Horsepower</option>
<option value="Pint">Pint</option>
</select>
<input name="submit" type="submit" id="submit" value="=">
</form>
</body>
</html>

Code: [Select]<?php
$number1 =$POST[number1];
$converter =$POST[converter];
if($converter == "Miles"){
$answer = $number1 1.609;
$unit = "Kilometres";
}
elseif($converter =="Inch"){
$answer = $number1 2.54;
$unit = "Centimetres";
}
elseif($converter =="Pound"){
$answer = $number1 0.454;
$unit = "Kilograms";
}
elseif($converter =="Horsepower"){
$answer = $number1 0.746;
$unit = "Kilowatts";
}
elseif($converter =="Pint"){
$answer = $number1 * 0.568;
$unit = "litres";
}
echo "$answer $unit";
?>
Why won't my second part of code function, so that when i click submit it should display 1.609 kilometeres = 1 mile. In the end, i should have 2 submit buttons.

Do I need to use a second for for this or the same one?

Please help

FijiSmithy

Sorry I got lost in all of your code there...

Your HTML page does it have a radio button or something to tell the PHP if you are converting from Imperial to Metric OR Metric to Imperial?

Then your ONE php page coudl see which conversion it's tryign to do.

Also rather than if and if else you could try a switch statement.

zobi316

would i need to use one form to convert that or another. how do i do that

tryingtolearn

Not sure if this is what you are after
But you could add all the possible conversions to the dropdown list
Since you already had all the if statements written I went that way

<head> 
<title>Convert Temperature</title> 
</head> 
<body> 
<h2>Conversion Chart</h2> 
<form action = "<?php echo $_SERVER[’PHP_SELF’]; ?>" 
method = "POST"> 
# to convert: 
<input type = "text" name = "number1" size=4> 
<select name="converter"> 
        <option value="Miles">
          Mile
        </option>
        <option value="Kilometers">
          Kilometer
        </option>
        <option value="Inch">
          Inch
        </option>
        <option value="Centimetres">
          Centimeter
        </option>
		<option value="Pound">
          Pound
        </option>
		<option value="Kilograms">
          Kilogram
        </option>
		<option value="Horsepower">
          Horsepower
        </option>
		<option value="Kilowatts">
          Kilowatts
        </option>
		<option value="Pint">
          Pint
        </option>
		<option value="Liter">
          Liter
        </option></select> 
<br/> 
<input type = "submit" name = "Convert "/> 
</form> 
<?php 
$number1 =$_POST[number1];
$converter =$_POST[converter];

if($converter == "Kilometers"){
$answer = $number1 / 1.609;
$unit = "Mile";
}

if($converter =="Centimetres"){
$answer = $number1 / 2.54;
$unit = "inch";
}

if($converter == "Kilograms"){
$answer = $number1 / 0.454;
$unit = "pound";
}

if($converter == "Kilowatts"){
$answer = $number1 / 0.746;
$unit = "horsepower";
}

if($converter == "Litres"){
$answer = $number1 / 0.568;
$unit = "pint";
}

if($converter == "Miles"){
$answer = $number1 * 1.609;
$unit = "Kilometres";
}
elseif($converter =="Inch"){
$answer = $number1 * 2.54;
$unit = "Centimetres";
}
elseif($converter =="Pound"){
$answer = $number1 * 0.454;
$unit = "Kilograms";
}
elseif($converter =="Horsepower"){
$answer = $number1 * 0.746;
$unit = "Kilowatts";
}
elseif($converter =="Pint"){
$answer = $number1 * 0.568;
$unit = "litres";
}
echo "$answer $unit";

?> 
</body> 
</html>