Writing a calculator function

willsteele

Okay, I've already done a nice little code to translate a floating number into a minute-and-second format to calculate paces for running races. Now, I need to make this a function. To be honest, I have no idea how to write the function and was wondering if someone could help. Here's the basic code:

<?php
//*Define variables
$distance="distance";
$d=26.21865;
$h=10;
$m=31;
$s=14.22;
$t=$h*3600+$m*60+$s;
$pace=$t/$d;
//*Set up concatenation
$pm = intval ($pace/60);
$sc = $pace/60; //*sc=Second Converter
$sc1 = (($sc-$pm)*60); //*sc1=Second Converter 1 
$ps = number_format($sc1, 2, ".", ","); //*ps=Pace (in seconds)
?>
<?php
if ($ps<10)
 	{
	print("Your time for the "." ".$distance." "."is: ".$h.":".$m.":".$s.".<br>");
	print("Your pace is: ".$pm.":0".$ps."."); 
    }
elseif ($ps>=10)
    {
	print("Your time for the "." ".$distance." "."is: ".$h.":".$m.":".$s.".<br>");
	print("Your pace is: ".$pm.":".$ps."."); 
	}
?>

Now, I know how the function is supposed to work...in theory.

<?php function pace() {...

But, that's where I get lost. Am I supposed to identify an argument, then run the code with the new argument values?

lth2h

This page should explain it all
http://us2.php.net/manual/en/language.functions.php

kakki

maybe this????

function pace( $distance='distance', $d=26.21865, $h=10, $m=31, $s=14.22 )
// returns result String 
{
$t=$h*3600+$m*60+$s;
$pace=$t/$d;
//*Set up concatenation
$pm = intval ($pace/60);
$sc = $pace/60; //*sc=Second Converter
$sc1 = (($sc-$pm)*60); //*sc1=Second Converter 1 
$ps = number_format($sc1, 2, ".", ","); //*ps=Pace (in seconds)
$resulttString= '';
if ($ps<10)
 	{
	$resulttString .= "Your time for the "." ".$distance." "."is: ".$h.":".$m.":".$s.".<br>";
	$resulttString .= "Your pace is: ".$pm.":0".$ps."."; 
    }
elseif ($ps>=10)
    {
	$resulttString .= "Your time for the "." ".$distance." "."is: ".$h.":".$m.":".$s.".<br>";
	$resulttString .= "Your pace is: ".$pm.":".$ps."."; 
    }
    retrun $resulttString;
}

willsteele

Thanks. That's good stuff. Any ideas on how to set the "distance", "hour", "minute" and "second" as variable instead of having fixed values so I can plug in a variety of numbers?

bike5

You can pass in custom values if you choose and if you fail to pass in a value it will use the default which is hard coded.

pace('Distance', 29.54,7,35, 18.21);