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A first useful program in PHP
Learning to Progam example from a Well House Consultants training course
More on Learning to Progam [link]

This example is described in the following article(s):
   • I have not programmed before, and need to learn - [link]

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Source code: small_demo.php Module: Q100
<html>
<head>
<title>Small Programming demo</title>
</head>
<body>
<h1>Temperature conversion in PHP</h1>
<?php

/* Converts a temperature in degrees F to degrees C.
Check to see if the form has been filled in ... */

if ($_REQUEST[intemp] != "") {
        
# Form filled - calculate and print results
        # Warning - you should check for injection attacks!
        
$faren $_REQUEST[intemp];
        
$celcius = ($faren 32 )/ 9.0 5.0;
        
printf("%.2f deg. F becomes %.2f deg. C",$faren,$celcius);
} else {
        
# No form filled in yet - put out a 'placeholder'
        
printf("Your results will come here");
        }
?><hr>
<form>Please enter a temperature
<input name=intemp size=4> deg F
<input type=submit value=go!>
</form><hr>
Copyright, etc ....
</body>
</html>

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